@article{DE_1970_6_8_a25,
     author = {M. A. Yagubov},
     title = {The branching of the solutions of a mixed problem for a certain operator-differential equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1528--1531},
     publisher = {mathdoc},
     volume = {6},
     number = {8},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1970_6_8_a25/}
}