@article{01658437,
title = {On a class of second order ODE with a typical degenerate nonlinearity.},
journal = {Portugaliae Mathematica. Nova S\'erie},
volume = {58},
year = {2001},
pages = {233-254},
zbl = {0987.34004},
language = {en},
url = {http://dml.mathdoc.fr/item/01658437}
}
Haraux, A.; Yan, Q. On a class of second order ODE with a typical degenerate nonlinearity.. Portugaliae Mathematica. Nova Série, Tome 58 (2001) pp. 233-254. http://gdmltest.u-ga.fr/item/01658437/