共 5 条
[2]
Birkhoff G., 1944, B AM MATH SOC, V50, P764, DOI [10.1090/S0002-9904-1944-08235-9, DOI 10.1090/S0002-9904-1944-08235-9]
[3]
BIRKHOFF G, 1948, AM MATH SOC C PUBLIC, V25
[4]
Funayama Nenosuke., 1942, P IMP ACAD TOKYO, V18, P553