@article{IVM_1993_1_a6,
     author = {A. G. Pinus},
     title = {On coverings in epimorphism skeletons of varieties},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {48--55},
     year = {1993},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1993_1_a6/}
}