@article{01139218, title = {A natural framing of knots.}, journal = {Geometry \& Topology}, volume = {2}, year = {1998}, pages = {31-64}, doi = {10.2140/gt.1998.2.31}, zbl = {0891.57010}, language = {en}, url = {http://dml.mathdoc.fr/item/01139218} }
Greene, Michael; Wiest, Bert. A natural framing of knots.. Geometry & Topology, Tome 2 (1998) pp. 31-64. doi : 10.2140/gt.1998.2.31. http://gdmltest.u-ga.fr/item/01139218/