@article{DE_1972_8_5_a3,
     author = {L. I. Zagulyaeva},
     title = {Conditions for the solvability of a certain boundary value problem for a system of differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {774--777},
     publisher = {mathdoc},
     volume = {8},
     number = {5},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_5_a3/}
}