共 8 条
[1]
Clifford A. H., 1961, ALGEBRAIC THEORY SEM, VI
[3]
KUROKI N, 1977, CZECH MATH J, V27, P43
[4]
KUROKI N, 1980, COMMENT MATH U ST PA, V28, P17
[5]
Petrich M., 1973, INTRO SEMIGROUPS
[7]
SZASZ G, 1977, 4 K MARX U EC DEP MA, P1