@article{IM2_2007_71_5_a3,
     author = {V. O. Manturov},
     title = {Khovanov homology for virtual knots with arbitrary coefficients},
     journal = {Izvestiya. Mathematics},
     pages = {967--999},
     year = {2007},
     volume = {71},
     number = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2007_71_5_a3/}
}