共 5 条
[1]
Chernoff P. R., 1968, J FUNCT ANAL, V2, P238
[3]
HILLE E, 1957, AM MATH SOC COLLOQ P, V31
[5]
Trotter H., 1959, P AM MATH SOC, V10, P545, DOI [10.1090/S0002-9939-1959-0108732-6, DOI 10.1090/S0002-9939-1959-0108732-6]