TY  - JOUR
AU  - Hansen, Vagn Lundsgaard
AU  - V, Peter Petersen
TI  - Groups, Coverings and Galois Theory
JO  - Canadian journal of mathematics
PY  - 1991
SP  - 1281
EP  - 1293
VL  - 43
IS  - 6
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1991-073-0/
DO  - 10.4153/CJM-1991-073-0
ID  - 10_4153_CJM_1991_073_0
ER  -