Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{KYB_1989__25_5_a6, author = {Niemel\"a, Lassi}, title = {On the directability of automata}, journal = {Kybernetika}, pages = {419--421}, publisher = {mathdoc}, volume = {25}, number = {5}, year = {1989}, mrnumber = {1024715}, zbl = {0718.68053}, language = {en}, url = {http://geodesic.mathdoc.fr/item/KYB_1989__25_5_a6/} }
Niemelä, Lassi. On the directability of automata. Kybernetika, Tome 25 (1989) no. 5, pp. 419-421. http://geodesic.mathdoc.fr/item/KYB_1989__25_5_a6/