@article{1102637081, author = {Kaiser, Uwe}, title = {Link homotopy in ${\bf R}^3$ and $S^3$.}, journal = {Pacific J. Math.}, volume = {151}, number = {2}, year = {1991}, pages = { 257-264}, language = {en}, url = {http://dml.mathdoc.fr/item/1102637081} }
Kaiser, Uwe. Link homotopy in ${\bf R}^3$ and $S^3$.. Pacific J. Math., Tome 151 (1991) no. 2, pp. 257-264. http://gdmltest.u-ga.fr/item/1102637081/