@article{ITA_2008__42_2_335_0,
     author = {Jir\'askov\'a, Galina and Okhotin, Alexander},
     title = {State complexity of cyclic shift},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {335--360},
     publisher = {EDP-Sciences},
     volume = {42},
     number = {2},
     year = {2008},
     doi = {10.1051/ita:2007038},
     mrnumber = {2401266},
     zbl = {1144.68033},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ita:2007038/}
}