共 9 条
[1]
Clifford A. H., 1962, AM MATH SOC
[3]
SEMIPRIME PI RINGS
[J].
PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY,
1973, 40 (02)
:365-369
[7]
Posner, 1960, P AM MATH SOC, V11, P180, DOI 10.1090/S0002-9939-1960-0111765-5