@article{DAN_1973_211_2_a8,
     author = {M. Sh. Tsalenko},
     title = {Categories of correspondences over regular categories},
     journal = {Doklady Akademii Nauk},
     pages = {297--299},
     publisher = {mathdoc},
     volume = {211},
     number = {2},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_211_2_a8/}
}