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@article{DE_1985_21_12_a3, author = {V. R. Kardashov}, title = {A nonlinear spectral problem that generates a complete system}, journal = {Differencialʹnye uravneni\^a}, pages = {2052--2057}, publisher = {mathdoc}, volume = {21}, number = {12}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1985_21_12_a3/} }
V. R. Kardashov. A nonlinear spectral problem that generates a complete system. Differencialʹnye uravneniâ, Tome 21 (1985) no. 12, pp. 2052-2057. http://geodesic.mathdoc.fr/item/DE_1985_21_12_a3/