@article{DAN_1957_113_6_a0,
     author = {S. I. Adian},
     title = {The role of the cancellation law in presenting cancellation semi-groups by means of defining relations},
     journal = {Doklady Akademii Nauk},
     pages = {1191--1194},
     publisher = {mathdoc},
     volume = {113},
     number = {6},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_113_6_a0/}
}