%0 Journal Article %A Magurn, Bruce A. %T Birelative K 2 of Groups of Square-Free Order %J Canadian journal of mathematics %D 1993 %P 369-379 %V 45 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1993-018-x/ %R 10.4153/CJM-1993-018-x %F 10_4153_CJM_1993_018_x