Tatjana Petkovic, Magnus Steinby. Piecewise Directable Automata. Journal of Automata, Languages and Combinatorics, 6(2):205-220, 2001.
@article{PetkovicS01, title = {Piecewise Directable Automata}, author = {Tatjana Petkovic and Magnus Steinby}, year = {2001}, researchr = {https://researchr.org/publication/PetkovicS01}, cites = {0}, citedby = {0}, journal = {Journal of Automata, Languages and Combinatorics}, volume = {6}, number = {2}, pages = {205-220}, }