@article{ITA_2012__46_4_461_0,
     author = {Allred, Jo\"el and Ultes-Nitsche, Ulrich},
     title = {$k$-counting automata},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {461--478},
     publisher = {EDP-Sciences},
     volume = {46},
     number = {4},
     year = {2012},
     doi = {10.1051/ita/2012021},
     zbl = {1279.68126},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ita/2012021/}
}