@article{DE_1978_14_2_a26,
     author = {V. I. Filippenko},
     title = {On one class of non-selfadjoint differential operators with a discrete spectrum},
     journal = {Differencialʹnye uravneni\^a},
     pages = {383--384},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1978_14_2_a26/}
}