Resolvent comparability of boundary problems for an operator sturm — liouville equation
Tài liệu tham khảo
M. L. Gorbachuk, Funkts. Anal. Prilozhen.,5, No. 1, 10–21 (1971).
V. A. Kutovoi, Ukr. Mat. Zh.,28, No. 4, 472–481 (1976).
M. G. Krein, in: First Summer Mathematics School [in Russian], Naukova Dumka, Kiev (1964).
V. I. Gorbachuk and M. L. Gorbachuk, Ukr. Mat. Zh.,24, No. 6, 726–734 (1972).