共 10 条
[1]
BARBATIS G, 2000, UNIFIED APPROACH IMP
[3]
Brezis H., 1997, ANN SC NORM PISA, V25, P217
[4]
Davies E.B., 1995, SPECTRAL THEORY DIFF, V42
[5]
DAVIES EB, OPER THEORY ADV APPL, V110, P55
[7]
MARKUS M, 1997, T AM MATH SOC, V28, P1601
[9]
MAZYA VG, 1985, SPRINGER SERIES SOVI
[10]
Opic B., 1990, Pitman Research Notes in Mathematics Series, V219