@article{IM2_1990_35_2_a6,
     author = {V. G. Turaev},
     title = {Operator invariants of tangles, and $R$-matrices},
     journal = {Izvestiya. Mathematics },
     pages = {411--444},
     publisher = {mathdoc},
     volume = {35},
     number = {2},
     year = {1990},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1990_35_2_a6/}
}