@article{DE_1975_11_12_a1,
     author = {N. A. Bobylev},
     title = {The two-point boundary value problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2121--2133},
     publisher = {mathdoc},
     volume = {11},
     number = {12},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_12_a1/}
}