@article{IVM_1970_2_a12,
     author = {D. E. Chernyi},
     title = {Algebraic properties of partial automata},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {94--99},
     publisher = {mathdoc},
     number = {2},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1970_2_a12/}
}