1. Cui, B., Gao, Y., Kari, L., Yu, S.: State complexity of catenation combined with star and reversal. In: Proceedings of Descriptional Complexity of Formal Systems 12th Workshop, Saskatoon, pp. 74–85 (2010)
2. Lecture Notes in Computer Science;B. Cui,2011
3. Lecture Notes in Computer Science;C. Câmpeanu,2001
4. Campeanu, C., Salomaa, K., Yu, S.: Tight lower bound for the state complexity of shuffle of regular languages. Journal of Automata, Languages and Combinatorics 7(3), 303–310 (2002)
5. Daley, M., Domaratzki, M., Salomaa, K.: State complexity of orthogonal catenation. In: Proceedings of Descriptional Complexity of Formal Systems 10th Workshop, Charlottetown, pp. 134–144 (2008)