TY  - JOUR
AU  - Macdonald, I. D.
TI  - Groups of breadth four have class five
JO  - Glasgow mathematical journal
PY  - 1978
SP  - 141
EP  - 148
VL  - 19
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500003530/
DO  - 10.1017/S0017089500003530
ID  - 10_1017_S0017089500003530
ER  -