@article{SM_1995_82_2_a14,
     author = {L. N. Shevrin},
     title = {On the theory of {epigroups.~I}},
     journal = {Sbornik. Mathematics},
     pages = {485--512},
     publisher = {mathdoc},
     volume = {82},
     number = {2},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_82_2_a14/}
}