@article{MMO_1980_41_a9,
     author = {M. Sh. {\CYRS}alenko},
     title = {Classification of categories of relations and types of regularity of categories},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {241--285},
     publisher = {mathdoc},
     volume = {41},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1980_41_a9/}
}