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11 P ET ROVA Z A O sciLlatiolls of a class of equations and inequalities of fourth
order Mathematics and Math ematical Education 5MB 35 (2006) 195- 200
12 P ETROVA Z A 0 cillations of cer tain fourth order charact cristic ini lial value
problems in Applications of Math ematics in Engineering fj Economics edited by 1
S M arinov and M D Todorov Proc 32nd International Conference MEE Softtr ade
Sofia (2007) 41-46
13 PETROV Z A Oscillations of som e equations and inequali ties of second
order and applications in m echanics iu Applications oj Mathematics in Engineering
fj Economics edited by M D Todorov Proc 33rd International Confer cnce AlvIEE
AIP CP946 Melville N ew York (2007) 224- 234
104 PET ROVA Z A G alerkin s m ethod and distributions of zeros of som gt equations
from the m echan ics I in Applications of Mathematics in Engineering fj Econumics
edited by 1 D T odorov Proc 341th International Conference ME AlP CP1067
Melville N ewark (2008) 390-402
6
15 PETROVA Z A Galerkins method and distributions of z ros of some equations
from the m chanics II in Applications of Mathematics in Engineering fj Economics
dited by G Venkov R Kovach va and Pashev Proc 35th Internat ional Conference
A lEE AIP CP1184 M lville Ne v York (2009) 143- 150
16 P ETROVA Z A Oscillation properties of the equat ion of Boussinesq and
comparison with oth r fourth order equations in Application of Mathematics in 1i chnical
and Natural Sciences edited by M D Todorov and C 1 Chri tOY Pro International
Conference AMiTaNS 09 AIP CP1186 Melville New York (2009) 292- 299
I7 PETROVA Z A Com arison results for some equat ions und r veral boundary
onditi ns 1 in Applications of Mathematics in Engineering fj Econumics edit d by
G V nkov R Kovacheva nd V Pasheva Proc 36th International Conference AMEE
AIP CP1293 ielvil1e New York (2010) 123- 13Cl
18 P ETROVA Z A Comparison results for some equation under several boundary
conditions II in Applications of Mathematics in Engincering fj Economics edilcd by
G Venkov R Kovacheva and V Pasheva Proc 37th International Conference AM E
AIP CP1410 M lville New York (2011) 203- 240 duil010631 3664371
19 P ETRO A Z A Oscillations of generalized Timoshenko beam cquat i ns
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II2 P ETROV Z A Oscillations of generalizations of the Duffin g equation C6opshy
liliK OKJIaLIH OT KOll cpepemJlUITa BbJIIapI151 H 6bJlrapHTe B EBpona BeJlHKOTbP IIOBO
abel (2010) 448- 453
II3 P ETROVA Z A ilat h cr[Iatical models of the Duffi ng equation arid more
general equations in Application of Mathematics in Technical and Natuml Sciences
edi ted by M D Todorov and C 1 Christov Proc International ConL rence AMiT NS10
AIP CP1301 Melvill 1 w York (2010) 115- 125
IIA P ETROYA Z Oscillation properties of some functional fourth order ordinary
diffi ent ial equations Pliska Math Stud Bulgar 21 (2012)307- 314
115 P ETROV Z A Oscillation properties of som functional fourth order h rperbolic
differential equa ions in Applications of Mathemati cs in EngiTleermiddoting fj Economics
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diffi ent ial equations Pliska Math Stud Bulgar 21 (2012)307- 314
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fj Economics edited by M D Todorov Proc 33rd International Confer cnce AlvIEE
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104 PET ROVA Z A G alerkin s m ethod and distributions of zeros of som gt equations
from the m echan ics I in Applications of Mathematics in Engineering fj Econumics
edited by 1 D T odorov Proc 341th International Conference ME AlP CP1067
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18 P ETROVA Z A Comparison results for some equation under several boundary
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19 P ETRO A Z A Oscillations of generalized Timoshenko beam cquat i ns
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liliK OKJIaLIH OT KOll cpepemJlUITa BbJIIapI151 H 6bJlrapHTe B EBpona BeJlHKOTbP IIOBO
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II3 P ETROVA Z A ilat h cr[Iatical models of the Duffi ng equation arid more
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edi ted by M D Todorov and C 1 Christov Proc International ConL rence AMiT NS10
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IIA P ETROYA Z Oscillation properties of some functional fourth order ordinary
diffi ent ial equations Pliska Math Stud Bulgar 21 (2012)307- 314
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differential equa ions in Applications of Mathemati cs in EngiTleermiddoting fj Economics
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order Mathematics and Math ematical Education 5MB 35 (2006) 195- 200
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13 PETROV Z A Oscillations of som e equations and inequali ties of second
order and applications in m echanics iu Applications oj Mathematics in Engineering
fj Economics edited by M D Todorov Proc 33rd International Confer cnce AlvIEE
AIP CP946 Melville N ew York (2007) 224- 234
104 PET ROVA Z A G alerkin s m ethod and distributions of zeros of som gt equations
from the m echan ics I in Applications of Mathematics in Engineering fj Econumics
edited by 1 D T odorov Proc 341th International Conference ME AlP CP1067
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15 PETROVA Z A Galerkins method and distributions of z ros of some equations
from the m chanics II in Applications of Mathematics in Engineering fj Economics
dited by G Venkov R Kovach va and Pashev Proc 35th Internat ional Conference
A lEE AIP CP1184 M lville Ne v York (2009) 143- 150
16 P ETROVA Z A Oscillation properties of the equat ion of Boussinesq and
comparison with oth r fourth order equations in Application of Mathematics in 1i chnical
and Natural Sciences edited by M D Todorov and C 1 Chri tOY Pro International
Conference AMiTaNS 09 AIP CP1186 Melville New York (2009) 292- 299
I7 PETROVA Z A Com arison results for some equat ions und r veral boundary
onditi ns 1 in Applications of Mathematics in Engineering fj Econumics edit d by
G V nkov R Kovacheva nd V Pasheva Proc 36th International Conference AMEE
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18 P ETROVA Z A Comparison results for some equation under several boundary
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G Venkov R Kovacheva and V Pasheva Proc 37th International Conference AM E
AIP CP1410 M lville New York (2011) 203- 240 duil010631 3664371
19 P ETRO A Z A Oscillations of generalized Timoshenko beam cquat i ns
C60PlUK )JOK aAH OT KORltpepeHlIIHITa BuITrans-201 2 26-28 eel TeMBpl1 C030rrOJI
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ILL P ETROVA Z A seillation properties of a class of second or ler uations
with variable coeffi i nts Novi Sad J Math 38 3 (2008) 113- 119
II2 P ETROV Z A Oscillations of generalizations of the Duffin g equation C6opshy
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II3 P ETROVA Z A ilat h cr[Iatical models of the Duffi ng equation arid more
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edi ted by M D Todorov and C 1 Christov Proc International ConL rence AMiT NS10
AIP CP1301 Melvill 1 w York (2010) 115- 125
IIA P ETROYA Z Oscillation properties of some functional fourth order ordinary
diffi ent ial equations Pliska Math Stud Bulgar 21 (2012)307- 314
115 P ETROV Z A Oscillation properties of som functional fourth order h rperbolic
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AMEE AlP CP1497 tvlel iIle New York (2012) 265- 272
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11 P ET ROVA Z A O sciLlatiolls of a class of equations and inequalities of fourth
order Mathematics and Math ematical Education 5MB 35 (2006) 195- 200
12 P ETROVA Z A 0 cillations of cer tain fourth order charact cristic ini lial value
problems in Applications of Math ematics in Engineering fj Economics edited by 1
S M arinov and M D Todorov Proc 32nd International Conference MEE Softtr ade
Sofia (2007) 41-46
13 PETROV Z A Oscillations of som e equations and inequali ties of second
order and applications in m echanics iu Applications oj Mathematics in Engineering
fj Economics edited by M D Todorov Proc 33rd International Confer cnce AlvIEE
AIP CP946 Melville N ew York (2007) 224- 234
104 PET ROVA Z A G alerkin s m ethod and distributions of zeros of som gt equations
from the m echan ics I in Applications of Mathematics in Engineering fj Econumics
edited by 1 D T odorov Proc 341th International Conference ME AlP CP1067
Melville N ewark (2008) 390-402
6
15 PETROVA Z A Galerkins method and distributions of z ros of some equations
from the m chanics II in Applications of Mathematics in Engineering fj Economics
dited by G Venkov R Kovach va and Pashev Proc 35th Internat ional Conference
A lEE AIP CP1184 M lville Ne v York (2009) 143- 150
16 P ETROVA Z A Oscillation properties of the equat ion of Boussinesq and
comparison with oth r fourth order equations in Application of Mathematics in 1i chnical
and Natural Sciences edited by M D Todorov and C 1 Chri tOY Pro International
Conference AMiTaNS 09 AIP CP1186 Melville New York (2009) 292- 299
I7 PETROVA Z A Com arison results for some equat ions und r veral boundary
onditi ns 1 in Applications of Mathematics in Engineering fj Econumics edit d by
G V nkov R Kovacheva nd V Pasheva Proc 36th International Conference AMEE
AIP CP1293 ielvil1e New York (2010) 123- 13Cl
18 P ETROVA Z A Comparison results for some equation under several boundary
conditions II in Applications of Mathematics in Engincering fj Economics edilcd by
G Venkov R Kovacheva and V Pasheva Proc 37th International Conference AM E
AIP CP1410 M lville New York (2011) 203- 240 duil010631 3664371
19 P ETRO A Z A Oscillations of generalized Timoshenko beam cquat i ns
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II2 P ETROV Z A Oscillations of generalizations of the Duffin g equation C6opshy
liliK OKJIaLIH OT KOll cpepemJlUITa BbJIIapI151 H 6bJlrapHTe B EBpona BeJlHKOTbP IIOBO
abel (2010) 448- 453
II3 P ETROVA Z A ilat h cr[Iatical models of the Duffi ng equation arid more
general equations in Application of Mathematics in Technical and Natuml Sciences
edi ted by M D Todorov and C 1 Christov Proc International ConL rence AMiT NS10
AIP CP1301 Melvill 1 w York (2010) 115- 125
IIA P ETROYA Z Oscillation properties of some functional fourth order ordinary
diffi ent ial equations Pliska Math Stud Bulgar 21 (2012)307- 314
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differential equa ions in Applications of Mathemati cs in EngiTleermiddoting fj Economics
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11 P ET ROVA Z A O sciLlatiolls of a class of equations and inequalities of fourth
order Mathematics and Math ematical Education 5MB 35 (2006) 195- 200
12 P ETROVA Z A 0 cillations of cer tain fourth order charact cristic ini lial value
problems in Applications of Math ematics in Engineering fj Economics edited by 1
S M arinov and M D Todorov Proc 32nd International Conference MEE Softtr ade
Sofia (2007) 41-46
13 PETROV Z A Oscillations of som e equations and inequali ties of second
order and applications in m echanics iu Applications oj Mathematics in Engineering
fj Economics edited by M D Todorov Proc 33rd International Confer cnce AlvIEE
AIP CP946 Melville N ew York (2007) 224- 234
104 PET ROVA Z A G alerkin s m ethod and distributions of zeros of som gt equations
from the m echan ics I in Applications of Mathematics in Engineering fj Econumics
edited by 1 D T odorov Proc 341th International Conference ME AlP CP1067
Melville N ewark (2008) 390-402
6
15 PETROVA Z A Galerkins method and distributions of z ros of some equations
from the m chanics II in Applications of Mathematics in Engineering fj Economics
dited by G Venkov R Kovach va and Pashev Proc 35th Internat ional Conference
A lEE AIP CP1184 M lville Ne v York (2009) 143- 150
16 P ETROVA Z A Oscillation properties of the equat ion of Boussinesq and
comparison with oth r fourth order equations in Application of Mathematics in 1i chnical
and Natural Sciences edited by M D Todorov and C 1 Chri tOY Pro International
Conference AMiTaNS 09 AIP CP1186 Melville New York (2009) 292- 299
I7 PETROVA Z A Com arison results for some equat ions und r veral boundary
onditi ns 1 in Applications of Mathematics in Engineering fj Econumics edit d by
G V nkov R Kovacheva nd V Pasheva Proc 36th International Conference AMEE
AIP CP1293 ielvil1e New York (2010) 123- 13Cl
18 P ETROVA Z A Comparison results for some equation under several boundary
conditions II in Applications of Mathematics in Engincering fj Economics edilcd by
G Venkov R Kovacheva and V Pasheva Proc 37th International Conference AM E
AIP CP1410 M lville New York (2011) 203- 240 duil010631 3664371
19 P ETRO A Z A Oscillations of generalized Timoshenko beam cquat i ns
C60PlUK )JOK aAH OT KORltpepeHlIIHITa BuITrans-201 2 26-28 eel TeMBpl1 C030rrOJI
(2012) 208 11
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with variable coeffi i nts Novi Sad J Math 38 3 (2008) 113- 119
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liliK OKJIaLIH OT KOll cpepemJlUITa BbJIIapI151 H 6bJlrapHTe B EBpona BeJlHKOTbP IIOBO
abel (2010) 448- 453
II3 P ETROVA Z A ilat h cr[Iatical models of the Duffi ng equation arid more
general equations in Application of Mathematics in Technical and Natuml Sciences
edi ted by M D Todorov and C 1 Christov Proc International ConL rence AMiT NS10
AIP CP1301 Melvill 1 w York (2010) 115- 125
IIA P ETROYA Z Oscillation properties of some functional fourth order ordinary
diffi ent ial equations Pliska Math Stud Bulgar 21 (2012)307- 314
115 P ETROV Z A Oscillation properties of som functional fourth order h rperbolic
differential equa ions in Applications of Mathemati cs in EngiTleermiddoting fj Economics
edited by G Venkov R Kovacheva and V Pasheva Proc 38th Intcrnational Conference
AMEE AlP CP1497 tvlel iIle New York (2012) 265- 272
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15 PETROVA Z A Galerkins method and distributions of z ros of some equations
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dited by G Venkov R Kovach va and Pashev Proc 35th Internat ional Conference
A lEE AIP CP1184 M lville Ne v York (2009) 143- 150
16 P ETROVA Z A Oscillation properties of the equat ion of Boussinesq and
comparison with oth r fourth order equations in Application of Mathematics in 1i chnical
and Natural Sciences edited by M D Todorov and C 1 Chri tOY Pro International
Conference AMiTaNS 09 AIP CP1186 Melville New York (2009) 292- 299
I7 PETROVA Z A Com arison results for some equat ions und r veral boundary
onditi ns 1 in Applications of Mathematics in Engineering fj Econumics edit d by
G V nkov R Kovacheva nd V Pasheva Proc 36th International Conference AMEE
AIP CP1293 ielvil1e New York (2010) 123- 13Cl
18 P ETROVA Z A Comparison results for some equation under several boundary
conditions II in Applications of Mathematics in Engincering fj Economics edilcd by
G Venkov R Kovacheva and V Pasheva Proc 37th International Conference AM E
AIP CP1410 M lville New York (2011) 203- 240 duil010631 3664371
19 P ETRO A Z A Oscillations of generalized Timoshenko beam cquat i ns
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(2012) 208 11
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ILL P ETROVA Z A seillation properties of a class of second or ler uations
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II3 P ETROVA Z A ilat h cr[Iatical models of the Duffi ng equation arid more
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IIA P ETROYA Z Oscillation properties of some functional fourth order ordinary
diffi ent ial equations Pliska Math Stud Bulgar 21 (2012)307- 314
115 P ETROV Z A Oscillation properties of som functional fourth order h rperbolic
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AMEE AlP CP1497 tvlel iIle New York (2012) 265- 272
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II2 P ETROV Z A Oscillations of generalizations of the Duffin g equation C6opshy
liliK OKJIaLIH OT KOll cpepemJlUITa BbJIIapI151 H 6bJlrapHTe B EBpona BeJlHKOTbP IIOBO
abel (2010) 448- 453
II3 P ETROVA Z A ilat h cr[Iatical models of the Duffi ng equation arid more
general equations in Application of Mathematics in Technical and Natuml Sciences
edi ted by M D Todorov and C 1 Christov Proc International ConL rence AMiT NS10
AIP CP1301 Melvill 1 w York (2010) 115- 125
IIA P ETROYA Z Oscillation properties of some functional fourth order ordinary
diffi ent ial equations Pliska Math Stud Bulgar 21 (2012)307- 314
115 P ETROV Z A Oscillation properties of som functional fourth order h rperbolic
differential equa ions in Applications of Mathemati cs in EngiTleermiddoting fj Economics
edited by G Venkov R Kovacheva and V Pasheva Proc 38th Intcrnational Conference
AMEE AlP CP1497 tvlel iIle New York (2012) 265- 272
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ILL P ETROVA Z A seillation properties of a class of second or ler uations
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II2 P ETROV Z A Oscillations of generalizations of the Duffin g equation C6opshy
liliK OKJIaLIH OT KOll cpepemJlUITa BbJIIapI151 H 6bJlrapHTe B EBpona BeJlHKOTbP IIOBO
abel (2010) 448- 453
II3 P ETROVA Z A ilat h cr[Iatical models of the Duffi ng equation arid more
general equations in Application of Mathematics in Technical and Natuml Sciences
edi ted by M D Todorov and C 1 Christov Proc International ConL rence AMiT NS10
AIP CP1301 Melvill 1 w York (2010) 115- 125
IIA P ETROYA Z Oscillation properties of some functional fourth order ordinary
diffi ent ial equations Pliska Math Stud Bulgar 21 (2012)307- 314
115 P ETROV Z A Oscillation properties of som functional fourth order h rperbolic
differential equa ions in Applications of Mathemati cs in EngiTleermiddoting fj Economics
edited by G Venkov R Kovacheva and V Pasheva Proc 38th Intcrnational Conference
AMEE AlP CP1497 tvlel iIle New York (2012) 265- 272
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ILL P ETROVA Z A seillation properties of a class of second or ler uations
with variable coeffi i nts Novi Sad J Math 38 3 (2008) 113- 119
II2 P ETROV Z A Oscillations of generalizations of the Duffin g equation C6opshy
liliK OKJIaLIH OT KOll cpepemJlUITa BbJIIapI151 H 6bJlrapHTe B EBpona BeJlHKOTbP IIOBO
abel (2010) 448- 453
II3 P ETROVA Z A ilat h cr[Iatical models of the Duffi ng equation arid more
general equations in Application of Mathematics in Technical and Natuml Sciences
edi ted by M D Todorov and C 1 Christov Proc International ConL rence AMiT NS10
AIP CP1301 Melvill 1 w York (2010) 115- 125
IIA P ETROYA Z Oscillation properties of some functional fourth order ordinary
diffi ent ial equations Pliska Math Stud Bulgar 21 (2012)307- 314
115 P ETROV Z A Oscillation properties of som functional fourth order h rperbolic
differential equa ions in Applications of Mathemati cs in EngiTleermiddoting fj Economics
edited by G Venkov R Kovacheva and V Pasheva Proc 38th Intcrnational Conference
AMEE AlP CP1497 tvlel iIle New York (2012) 265- 272
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C q)IUI (2007) J 59 -63
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39-42
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39-42
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