@article{02214032,
title = {Existence of nonnegative solutions of singular boundary-value problems for second-order ordinary differential equations.},
journal = {Zapiski Nauchnykh Seminarov POMI},
volume = {321},
year = {2005},
pages = {215-222},
zbl = {1094.34509},
language = {en},
url = {http://dml.mathdoc.fr/item/02214032}
}
Yakovlev, M.N. Existence of nonnegative solutions of singular boundary-value problems for second-order ordinary differential equations.. Zapiski Nauchnykh Seminarov POMI, Tome 321 (2005) pp. 215-222. http://gdmltest.u-ga.fr/item/02214032/