@article{ITA_1989__23_3_235_0,
     author = {Allouche, J.-P. and Betrema, J. and Shallit, J. O.},
     title = {Sur des points fixes de morphismes d'un mono{\"\i}de libre},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {235--249},
     publisher = {EDP-Sciences},
     volume = {23},
     number = {3},
     year = {1989},
     mrnumber = {1020473},
     zbl = {0691.68065},
     language = {fr},
     url = {http://www.numdam.org/item/ITA_1989__23_3_235_0/}
}