共 5 条
[1]
PERRON O, 1932, ALGEBRA, V1, P92
[2]
UNSOLD A, 1938, PHYSIK STERNATMOSPHA, P113
[3]
1945, AP J, V101, P320
[4]
1944, AP J, V100, P76
[5]
1944, AP J, V99, P180