共 9 条
[1]
BERGMAN S, 1957, T AM MATH SOC, V85, P462
[2]
BERGMAN S, 1961, ERGEBNISSE MATHEMATI, P207
[4]
GILBERT RP, 1969, MATH SCI ENGINEERING, V54
[7]
Hormander L., 1969, GRUNDLEHREN MATH WIS, V116
[8]
Vekua I.N, 1948, NEW METHODS SOLVING
[9]
VEKUA IN, 1967, SERIES APPL MATH, V1