@article{MZM_1984_35_5_a5,
     author = {G. U. Oganesyan},
     title = {Isomorphism problem for semigroups with one defining relation},
     journal = {Matemati\v{c}eskie zametki},
     pages = {685--690},
     publisher = {mathdoc},
     volume = {35},
     number = {5},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1984_35_5_a5/}
}