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@article{DE_1989_25_6_a23, author = {I. S. Lomov}, title = {The basis property of root functions of operators with multipoint boundary conditions}, journal = {Differencialʹnye uravneni\^a}, pages = {1053--1056}, publisher = {mathdoc}, volume = {25}, number = {6}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1989_25_6_a23/} }
I. S. Lomov. The basis property of root functions of operators with multipoint boundary conditions. Differencialʹnye uravneniâ, Tome 25 (1989) no. 6, pp. 1053-1056. http://geodesic.mathdoc.fr/item/DE_1989_25_6_a23/