共 4 条
[1]
Birkhoff G., 1940, AM MATH SOC C PUBL
[2]
BOCHNER S, 1942, DUKE MATH J, V9, P519
[3]
Freudenthal H, 1936, P K AKAD WET-AMSTERD, V39, P641
[4]
NAGY BS, 1942, ERGEBNISSE MATH IHRE, V5