@article{04203274, title = {Geometric presentations of classical knot groups.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {14}, year = {1991}, pages = {289-292}, doi = {10.1155/S0161171291000339}, zbl = {0728.57003}, language = {en}, url = {http://dml.mathdoc.fr/item/04203274} }
Erbland, John; Guterriez, Mauricio. Geometric presentations of classical knot groups.. International Journal of Mathematics and Mathematical Sciences, Tome 14 (1991) pp. 289-292. doi : 10.1155/S0161171291000339. http://gdmltest.u-ga.fr/item/04203274/