@article{GDZPPN002330040, title = {Unfoldings in Knot Theory.}, journal = {Mathematische Annalen}, volume = {277}, year = {1987}, pages = {409-440}, zbl = {0675.57010}, url = {http://dml.mathdoc.fr/item/GDZPPN002330040} }
Neumann, Walter; Rudolph, Lee. Unfoldings in Knot Theory.. Mathematische Annalen, Tome 277 (1987) pp. 409-440. http://gdmltest.u-ga.fr/item/GDZPPN002330040/