TY  - JOUR
AU  - Kuperberg, Greg
TI  - What is a virtual link?
JO  - Algebraic and Geometric Topology
PY  - 2003
SP  - 587
EP  - 591
VL  - 3
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.2140/agt.2003.3.587/
DO  - 10.2140/agt.2003.3.587
ID  - 10_2140_agt_2003_3_587
ER  -