@article{DE_1989_25_8_a4,
     author = {Yu. V. Pokornyi and K. P. Lazarev and T. M. Gareeva},
     title = {Nonlocal boundary value problems for ordinary differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1321--1332},
     publisher = {mathdoc},
     volume = {25},
     number = {8},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_8_a4/}
}