@article{SM_1995_83_1_a6,
     author = {L. N. Shevrin},
     title = {On the theory of {epigroups.~II}},
     journal = {Sbornik. Mathematics},
     pages = {133--154},
     publisher = {mathdoc},
     volume = {83},
     number = {1},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_83_1_a6/}
}