@article{ITA_2000__34_5_331_0,
     author = {H\'eam, Pierre-Cyrille},
     title = {A lower bound for reversible automata},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {331--341},
     publisher = {EDP-Sciences},
     volume = {34},
     number = {5},
     year = {2000},
     mrnumber = {1829230},
     zbl = {0987.68043},
     language = {en},
     url = {http://archive.numdam.org/item/ITA_2000__34_5_331_0/}
}