@article{DE_1976_12_10_a10,
     author = {N. M. Krukovskii},
     title = {The $m$-fold completeness of the system of generalized eigen- and associated functions of a nonselfadjoint elliptic operator, and the membership of the classical eigen- and associated functions of the operator in the class $W_2^1$},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1832--1841},
     publisher = {mathdoc},
     volume = {12},
     number = {10},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_10_a10/}
}