@article{IVM_1994_1_a8,
     author = {E. G. Tret'yakova},
     title = {On a~free two-generator unary {Clifford} semigroup},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {71--75},
     publisher = {mathdoc},
     number = {1},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1994_1_a8/}
}