@article{GDZPPN002329948, title = {A New Knot Invariant.}, journal = {Mathematische Annalen}, volume = {277}, year = {1987}, pages = {193-210}, zbl = {0632.57006}, url = {http://dml.mathdoc.fr/item/GDZPPN002329948} }
Kuiper, Nicolaas H. A New Knot Invariant.. Mathematische Annalen, Tome 277 (1987) pp. 193-210. http://gdmltest.u-ga.fr/item/GDZPPN002329948/