@article{CMFD_2013_51_a7,
     author = {I. M. Nikonov},
     title = {Weak parities and functorial maps},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {123--141},
     year = {2013},
     volume = {51},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2013_51_a7/}
}