Mariusz Grech, Andrzej Kisielewicz. The Černý conjecture for automata respecting intervals of a directed graph. Discrete Mathematics & Theoretical Computer Science, 15(3):61-72, 2013. [doi]
@article{GrechK13a, title = {The Černý conjecture for automata respecting intervals of a directed graph}, author = {Mariusz Grech and Andrzej Kisielewicz}, year = {2013}, url = {http://www.dmtcs.org/dmtcs-ojs/index.php/dmtcs/article/view/2198}, researchr = {https://researchr.org/publication/GrechK13a}, cites = {0}, citedby = {0}, journal = {Discrete Mathematics & Theoretical Computer Science}, volume = {15}, number = {3}, pages = {61-72}, }