%0 Journal Article
%A Roggenkamp, K. W.
%T Groupings of Metabelian Groups and Extension Categories
%J Canadian journal of mathematics
%D 1980
%P 449-459
%V 32
%N 2
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1980-036-7/
%R 10.4153/CJM-1980-036-7
%F 10_4153_CJM_1980_036_7