TY  - JOUR
AU  - M.J. Tomkinson
TI  - Groups as the union of proper subgroups.
JO  - Mathematica Scandinavica
PY  - 1998
SP  - 191
EP  - 198
VL  - 81
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1998__81_2_167435/
ID  - MS2_1998__81_2_167435
ER  -