TY  - JOUR
AU  - Roggenkamp, K. W.
TI  - Groupings of Metabelian Groups and Extension Categories
JO  - Canadian journal of mathematics
PY  - 1980
SP  - 449
EP  - 459
VL  - 32
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1980-036-7/
DO  - 10.4153/CJM-1980-036-7
ID  - 10_4153_CJM_1980_036_7
ER  -