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@article{FAA_1972_6_2_a10, author = {M. M. Gekhtman}, title = {On the spectrum of an operator {Sturm--Liouville} equation}, journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a}, pages = {81--82}, publisher = {mathdoc}, volume = {6}, number = {2}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FAA_1972_6_2_a10/} }
M. M. Gekhtman. On the spectrum of an operator Sturm--Liouville equation. Funkcionalʹnyj analiz i ego priloženiâ, Tome 6 (1972) no. 2, pp. 81-82. http://geodesic.mathdoc.fr/item/FAA_1972_6_2_a10/