@article{DE_1995_31_3_a6,
     author = {P. A. Kozhukhar'},
     title = {On the point spectrum of nonselfadjoint differential operators with periodic coefficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {434--439},
     publisher = {mathdoc},
     volume = {31},
     number = {3},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1995_31_3_a6/}
}