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@article{IVM_1972_6_a2, author = {A. A. Donis}, title = {On the completeness problem in automata theory}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {19--25}, publisher = {mathdoc}, number = {6}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1972_6_a2/} }
A. A. Donis. On the completeness problem in automata theory. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1972), pp. 19-25. http://geodesic.mathdoc.fr/item/IVM_1972_6_a2/