@article{DE_1987_23_10_a3,
     author = {A. G. Lomtatidze},
     title = {Positive solutions of boundary value problems for second-order ordinary differential equations with singularities},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1685--1692},
     publisher = {mathdoc},
     volume = {23},
     number = {10},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_10_a3/}
}