@article{DE_1969_5_11_a5,
     author = {I. T. Kiguradze},
     title = {The singular two-point boundary value problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2002--2016},
     publisher = {mathdoc},
     volume = {5},
     number = {11},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_11_a5/}
}