共 4 条
[1]
[Anonymous], 1966, PERTURBATION THEORY
[2]
BIRMAN MS, 1977, ITOGI NAUKI MAT ANAL, V14, P5
[3]
BOIMATOV KK, 1984, T SEM PETROVSK, P78
[4]
Triebel H., 1978, N HOLLAND MATH LIBR