@article{IM2_1990_34_3_a5,
     author = {V. G. Turaev},
     title = {Euler structures, nonsingular vector fields, and torsions of {Reidemeister} type},
     journal = {Izvestiya. Mathematics},
     pages = {627--662},
     year = {1990},
     volume = {34},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1990_34_3_a5/}
}