@article{Imreh_Steinby_1995, title={Some remarks on directable automata}, volume={12}, url={https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3441}, number={1}, journal={Acta Cybernetica}, author={Imreh, Balázs and Steinby, Magnus}, year={1995}, month={Jan.}, pages={23-35} }