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@article{DAN_1970_191_6_a3, author = {I. I. Golichev}, title = {The discreteness of the spectrum of nonselfadjoint operators}, journal = {Doklady Akademii Nauk}, pages = {1212--1215}, publisher = {mathdoc}, volume = {191}, number = {6}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1970_191_6_a3/} }
I. I. Golichev. The discreteness of the spectrum of nonselfadjoint operators. Doklady Akademii Nauk, Tome 191 (1970) no. 6, pp. 1212-1215. http://geodesic.mathdoc.fr/item/DAN_1970_191_6_a3/