@article{IVM_1966_4_a22,
     author = {\`E. G. Shutov},
     title = {Potential invertibility of elements of semigroups},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {153--163},
     publisher = {mathdoc},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1966_4_a22/}
}