@article{DE_1986_22_7_a2,
     author = {M. M. Ad'yutov},
     title = {An existence theorem for the solution of a boundary value problem for a system of two second-order differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1129--1134},
     publisher = {mathdoc},
     volume = {22},
     number = {7},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_7_a2/}
}