共 17 条
[1]
COHN PM, 1965, UNIVERSAL ALGEBRA
[2]
CROSSLEY JN, 1977, J ALGEBRA, V41, P398
[3]
CROSSLEY JN, 1974, COMBINATORIAL FUNCTO
[4]
Frohlich A., 1955, MATH Z, V62, P331
[5]
Hodge W. V. D., 1947, METHODS ALGEBRAIC GE, VI
[8]
Metakides G., 1979, ANN MATH LOGIC, V17, P289
[9]
Metakides G., 1977, ANN MATH LOG, V11, P147