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@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/} }
D. E. Chernyi. Algebraic properties of partial automata. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 2 (1970), pp. 94-99. http://geodesic.mathdoc.fr/item/IVM_1970_2_a12/