共 11 条
[2]
Armendariz E.P., 1974, J AUSTR MATH SOC, V18, P470
[6]
Kaplansky I., 1965, RINGS OPERATORS
[9]
Krempa J., 1996, ALGEBRA C, V3, P289
[10]
Lee TK, 2003, HOUSTON J MATH, V29, P583