@article{GDZPPN002474921,
title = {Some Properties of Solutions of u''(t) + a(t) f(u) g(u') = 0 (II).},
journal = {Monatshefte f\"ur Mathematik},
volume = {69},
year = {1965},
pages = {368-374},
zbl = {0142.06402},
url = {http://dml.mathdoc.fr/item/GDZPPN002474921}
}
Wong, J.S.W.; Burton, T.A. Some Properties of Solutions of u''(t) + a(t) f(u) g(u') = 0 (II).. Monatshefte für Mathematik, Tome 69 (1965) pp. 368-374. http://gdmltest.u-ga.fr/item/GDZPPN002474921/