%0 Journal Article %A WEI, JUNCHAO %A LI, LIBIN %T MC2 RINGS AND WQD RINGS* %J Glasgow mathematical journal %D 2009 %P 691-702 %V 51 %N 3 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089509990103/ %R 10.1017/S0017089509990103 %F 10_1017_S0017089509990103