@article{ITA_2009__43_1_95_0,
     author = {Selivanov, Victor L.},
     title = {Hierarchies and reducibilities on regular languages related to modulo counting},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {95--132},
     publisher = {EDP-Sciences},
     volume = {43},
     number = {1},
     year = {2009},
     doi = {10.1051/ita:2007063},
     mrnumber = {2483446},
     zbl = {1174.03016},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ita:2007063/}
}