TY  - JOUR
AU  - Vagn Lundsgaard Hansen
TI  - The characteristic algebra of a polynomial covering map.
JO  - Mathematica Scandinavica
PY  - 1989
SP  - 219
EP  - 225
VL  - 64
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1989__64_2_186113/
ID  - MS2_1989__64_2_186113
ER  -