@article{TM_1973_133_a15,
     author = {V. A. Osipova},
     title = {On the conjugacy problem in semigroups},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {169--182},
     year = {1973},
     volume = {133},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1973_133_a15/}
}