@article{DE_1976_12_2_a23,
     author = {V. G. Raskin},
     title = {The solvability of operator-differential equations of arbitrary order},
     journal = {Differencialʹnye uravneni\^a},
     pages = {362--364},
     publisher = {mathdoc},
     volume = {12},
     number = {2},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_2_a23/}
}