共 13 条
[1]
Atiyah M. F., 1969, Introduction To Commutative Algebra, Addison-Wesley series in mathematics
[2]
BERGMAN GM, 1977, T AM MATH SOC, V200, P33
[3]
Cohn P. M., 1981, Universal Algebra
[4]
Cohn P.M., 1966, TOPOLOGY, V5, P215
[5]
Cohn P. M., 1982, ALGEBRA, V1
[6]
COHN PM, 1977, ALGEBRA 2
[8]
Howie, 1976, INTRO SEMIGROUP THEO, V7
[9]
Leavitt W. G., 1957, Proc. Amer. Math. Soc, V8, P322, DOI DOI 10.2307/2033737