@article{KYB_1986__22_1_a7,
     author = {Demlov\'a, Marie and Koubek, V\'aclav},
     title = {Fast diagnosis of some semigroup properties of automata},
     journal = {Kybernetika},
     pages = {92--99},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1986},
     mrnumber = {839348},
     zbl = {0608.68042},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1986__22_1_a7/}
}