@article{02206556, title = {The nonuniqueness of Chekanov polynomials of Legendrian knots.}, journal = {Geometry \& Topology}, volume = {5}, year = {2005}, pages = {1221-1252}, doi = {10.2140/gt.2005.9.1221}, zbl = {1084.57009}, language = {en}, url = {http://dml.mathdoc.fr/item/02206556} }
Melvin, Paul; Shrestha, Sumana. The nonuniqueness of Chekanov polynomials of Legendrian knots.. Geometry & Topology, Tome 5 (2005) pp. 1221-1252. doi : 10.2140/gt.2005.9.1221. http://gdmltest.u-ga.fr/item/02206556/