1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P
1996MNRAS.281...27P