1. Ananichev, D.S., Volkov, M.V.: Synchronizing monotonic automata. Theor. Comput. Sci. 327(3), 225–239 (2004)
2. Černý, J.: Poznámka k. homogénnym experimentom s konecnými automatmi. Mat. fyz. čas SAV 14, 208–215 (1964)
3. Eppstein, D.: Reset sequences for monotonic automata. SIAM J. Comput. 19(3), 500–510 (1990)
4. Fernau, H., Gusev, V.V., Hoffmann, S., Holzer, M., Volkov, M.V., Wolf, P.: Computational complexity of synchronization under regular constraints. In: Rossmanith, P., Heggernes, P., Katoen, J. (eds.) MFCS 2019. LIPIcs, vol. 138, pp. 63:1–63:14. Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2019)
5. Gómez, A.C., Guaiana, G., Pin, J.: Regular languages and partial commutations. Inf. Comput. 230, 76–96 (2013)