TY  - JOUR
AU  - Przytycki, Józef H.
AU  - Rosicki, Witold
TI  - The Topological Interpretation of the Core Group of a Surface in S 4
JO  - Canadian mathematical bulletin
PY  - 2002
SP  - 131
EP  - 137
VL  - 45
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-2002-016-0/
DO  - 10.4153/CMB-2002-016-0
ID  - 10_4153_CMB_2002_016_0
ER  -