@article{DE_1986_22_3_a14,
     author = {Yu. I. Khmelevskii},
     title = {Existence and uniqueness theorems for a class of problems with operator coefficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {463--472},
     publisher = {mathdoc},
     volume = {22},
     number = {3},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_3_a14/}
}