TY  - JOUR
AU  - Richard K. Skora
TI  - Knot and link projections in 3-manifolds.
JO  - Mathematische Zeitschrift
PY  - 1991
SP  - 345
EP  - 350
VL  - 206
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1991__206_1_174231/
ID  - MZ_1991__206_1_174231
ER  -