@article{ITA_2008__42_2_217_0,
     author = {Karhum\"aki, Juhani and Kari, Jarkko and Kupke, Joachim},
     title = {Binary operations on automatic functions},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {217--236},
     publisher = {EDP-Sciences},
     volume = {42},
     number = {2},
     year = {2008},
     doi = {10.1051/ita:2007036},
     mrnumber = {2401259},
     zbl = {1144.68034},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/ita:2007036/}
}