Link concordance implies link homotopy.
Giffen, Charles H.
Mathematica Scandinavica, Tome 44 (1979), p. 243-254 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1979-01-01
EUDML-ID : urn:eudml:doc:166677 
@article{GDZPPN002355884,
     title = {Link concordance implies link homotopy.},
     journal = {Mathematica Scandinavica},
     volume = {44},
     year = {1979},
     pages = {243-254},
     zbl = {0453.57002},
     url = {http://dml.mathdoc.fr/item/GDZPPN002355884}
}

Giffen, Charles H. Link concordance implies link homotopy.. Mathematica Scandinavica, Tome 44 (1979) pp. 243-254. http://gdmltest.u-ga.fr/item/GDZPPN002355884/