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@article{IVM_2010_1_a5, author = {P. V. Martyugin}, title = {A lower bound for the length of the shortest carefully synchronizing words}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {59--68}, publisher = {mathdoc}, number = {1}, year = {2010}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_2010_1_a5/} }
P. V. Martyugin. A lower bound for the length of the shortest carefully synchronizing words. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (2010), pp. 59-68. http://geodesic.mathdoc.fr/item/IVM_2010_1_a5/