共 4 条
[1]
AGMON S, 1965, LECTURES ELLIPTIC BO
[2]
Dunford N., 1963, LINEAR OPERATORS PAR
[3]
Molchanov A.M, 1953, T MOSKOV MAT OBSC, V2, P169
[4]
Rellich F., 1948, EIGENWERTPROBLEM DEL, P329