共 7 条
[1]
BOURBAKI N, 1962, ALGEBRE, P1236
[2]
Crowell R. H., 1961, NAGOYA MATH J, V19, P27
[5]
Maclane S., 1963, HOMOLOGY
[6]
THRELFALL W, 1949, SITZUNGSBER HEIDELB, P357
[7]
[No title captured]