@article{VCHGU_2008_10_a11,
     author = {D. V. Gorkovets},
     title = {Distributive grouppoids for knots in projective space},
     journal = {Vestnik Chelyabinskogo Gosudarstvennogo Universiteta. Matematika, Mekhanika, Informatika},
     pages = {89--93},
     publisher = {mathdoc},
     number = {10},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VCHGU_2008_10_a11/}
}