%0 Journal Article %A OUYANG, LUNQUN %T ORE EXTENSIONS OF WEAK ZIP RINGS* %J Glasgow mathematical journal %D 2009 %P 525-537 %V 51 %N 3 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089509005151/ %R 10.1017/S0017089509005151 %F 10_1017_S0017089509005151