共 12 条
- [1] Akhiezer N. I., 1961, THEORY LINEAR OPERAT, VI
- [4] EVANS WD, 1976, LECTURE NOTES MATH
- [5] NOTE ON DIRICHLET CONDITION FOR 2ND-ORDER DIFFERENTIAL EXPRESSIONS [J]. CANADIAN JOURNAL OF MATHEMATICS-JOURNAL CANADIEN DE MATHEMATIQUES, 1976, 28 (02): : 312 - 320
- [6] EVERITT WN, 1976, LECTURE NOTES MATH
- [7] EVERITT WN, 1975, P INT C DIFFERENTIAL, P287
- [9] Kato T., 1966, PERTURBATION THEORY, V132, P396
- [10] KWONG MK, Q J MATH OXFORD SER