@article{ZNSL_2006_334_a17,
     author = {M. N. Yakovlev},
     title = {Mixed boundary-value problems for singular second-order ordinary differential equations},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {246--266},
     publisher = {mathdoc},
     volume = {334},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2006_334_a17/}
}