%0 Journal Article %A Leavitt, W. G. %T Type Radicals %J Glasgow mathematical journal %D 1968 %P 22-29 %V 9 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500000252/ %R 10.1017/S0017089500000252 %F 10_1017_S0017089500000252