TY  - JOUR
AU  - Kent E. Orr
TI  - Homotopy invariants of links.
JO  - Inventiones mathematicae
PY  - 1989
SP  - 379
EP  - 394
VL  - 95
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM_1989__95_3_143657/
ID  - IM_1989__95_3_143657
ER  -