@article{GDZPPN00223341X, title = {Belts and k-invariants of link maps in spheres.}, journal = {Manuscripta mathematica}, volume = {76}, year = {1992}, pages = {241-250}, zbl = {0791.57016}, url = {http://dml.mathdoc.fr/item/GDZPPN00223341X} }
Koschorke, Ulrich. Belts and k-invariants of link maps in spheres.. Manuscripta mathematica, Tome 76 (1992) pp. 241-250. http://gdmltest.u-ga.fr/item/GDZPPN00223341X/