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@article{DE_1989_25_1_a20, author = {Ya. N. Mamedov}, title = {On the completeness of root functions of some boundary value problems}, journal = {Differencialʹnye uravneni\^a}, pages = {167--169}, publisher = {mathdoc}, volume = {25}, number = {1}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1989_25_1_a20/} }
Ya. N. Mamedov. On the completeness of root functions of some boundary value problems. Differencialʹnye uravneniâ, Tome 25 (1989) no. 1, pp. 167-169. http://geodesic.mathdoc.fr/item/DE_1989_25_1_a20/