@article{DE_1983_19_10_a13,
     author = {V. Ya. Yakubov},
     title = {A nonselfadjoint irregular elliptic spectral partial differential boundary value problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1777--1785},
     publisher = {mathdoc},
     volume = {19},
     number = {10},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_10_a13/}
}