@article{ITA_2010__44_2_209_0,
     author = {\v{C}ern\'y, Anton},
     title = {Generalizations of {Parikh} mappings},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {209--228},
     publisher = {EDP-Sciences},
     volume = {44},
     number = {2},
     year = {2010},
     doi = {10.1051/ita/2009021},
     mrnumber = {2674541},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ita/2009021/}
}