TY  - JOUR
AU  - Antonio Costa
AU  - Luigi Grasselli
TI  - Universal coverings of PL-mainfolds via coloured graphs.
JO  - Aequationes mathematicae
PY  - 1992
SP  - 60
EP  - 71
VL  - 44
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1992__44_1_137480/
ID  - AM2_1992__44_1_137480
ER  -