@article{02213794,
title = {Solvability of singular boundary value problems for ordinary differential equations of order },
journal = {Zapiski Nauchnykh Seminarov POMI},
volume = {314},
year = {2004},
pages = {174-188},
zbl = {1089.34020},
language = {en},
url = {http://dml.mathdoc.fr/item/02213794}
}
Yakovlev, M.N. Solvability of singular boundary value problems for ordinary differential equations of order . Zapiski Nauchnykh Seminarov POMI, Tome 314 (2004) pp. 174-188. http://gdmltest.u-ga.fr/item/02213794/