@article{GDZPPN002106086,
title = {Homotopy invariants of links.},
journal = {Inventiones mathematicae},
volume = {96},
year = {1989},
pages = {379-394},
zbl = {0668.57014},
url = {http://dml.mathdoc.fr/item/GDZPPN002106086}
}
Orr, Kent E. Homotopy invariants of links.. Inventiones mathematicae, Tome 96 (1989) pp. 379-394. http://gdmltest.u-ga.fr/item/GDZPPN002106086/