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@article{DE_1992_28_8_a22, author = {V. D. Budaev}, title = {Some properties of root functions of higher-order ordinary differential operators}, journal = {Differencialʹnye uravneni\^a}, pages = {1454--1456}, publisher = {mathdoc}, volume = {28}, number = {8}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1992_28_8_a22/} }
V. D. Budaev. Some properties of root functions of higher-order ordinary differential operators. Differencialʹnye uravneniâ, Tome 28 (1992) no. 8, pp. 1454-1456. http://geodesic.mathdoc.fr/item/DE_1992_28_8_a22/