@article{VCHGU_2015_17_a2,
     author = {D. Bar-Natan},
     title = {A note on the unitarity property of the {Gassner} invarian},
     journal = {Vestnik Chelyabinskogo Gosudarstvennogo Universiteta. Matematika, Mekhanika, Informatika},
     pages = {22--25},
     publisher = {mathdoc},
     number = {17},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VCHGU_2015_17_a2/}
}