@article{IVM_1971_7_a7,
     author = {P. M. Olonichev},
     title = {A~characterization of the projections of monogenic partial transformation {semigroups.~I}},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {54--62},
     publisher = {mathdoc},
     number = {7},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1971_7_a7/}
}