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@article{DAN_1963_153_4_a4, author = {F. G. Maksudov}, title = {On the spectrum of singular non-selfadjoint differential operators of order~$2n$}, journal = {Doklady Akademii Nauk}, pages = {758--761}, publisher = {mathdoc}, volume = {153}, number = {4}, year = {1963}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1963_153_4_a4/} }
F. G. Maksudov. On the spectrum of singular non-selfadjoint differential operators of order~$2n$. Doklady Akademii Nauk, Tome 153 (1963) no. 4, pp. 758-761. http://geodesic.mathdoc.fr/item/DAN_1963_153_4_a4/