@article{03615100,
title = {Behavior of second order nonlinear differential equations.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {1},
year = {1978},
pages = {1-12},
doi = {10.1155/S0161171278000010},
zbl = {0396.34028},
language = {en},
url = {http://dml.mathdoc.fr/item/03615100}
}
Ling, Rina. Behavior of second order nonlinear differential equations.. International Journal of Mathematics and Mathematical Sciences, Tome 1 (1978) pp. 1-12. doi : 10.1155/S0161171278000010. http://gdmltest.u-ga.fr/item/03615100/