Link to full text articles :

http://www.sciencedirect.com/science/article/pii/S073519331500010X

http://ac.els-cdn.com/S073519331500010X/1-s2.0-S073519331500010X-main.pdf?_tid=8c7d4ca8-4011-11e5-

9403-00000aab0f26&acdnat=1439288162_8e40451db706c2f70996b410299a69ca