1. Domaratzki, M.: Deletion Along Trajectories. Tech. report 464-2003, School of Computing, Queen’s University (2003) and accepted for publication
2. Domaratzki, M.: Splicing on Routes versus Shuffle and Deletion Along Trajectories. Tech. report 2003-471, School of Computing, Queen’s University (2003)
3. Domaratzki, M.: Decidability of Trajectory-Based Equations. Tech. report 2003-472, School of Computing, Queen’s University (2003)
4. Domaratzki, M., Mateescu, A., Salomaa, K., Yu, S.: Deletion on Trajectories and Commutative Closure. In: Harju, T., Karhumaki, J. (eds.) WORDS 2003: 4th International Conference on Combinatorics on Words, TUCS General Publication No. 27, August 2003, pp. 309–319 (2003)
5. Ito, M., Kari, L., Thierrin, G.: Shuffle and scattered deletion closure of languages. Theoretical Computer Science 245, 115–133 (2000)