1. Adorna, H., Păun, Gh., Pérez-Jiménez, M.J.: On communication complexity in evolution-communication P systems. Romanian Journal of Information Science and Technology 13(2), 113–130 (2010)
2. Bordihn, H., Fernau, H.: The degree of parallelism. Journal of Automata, Languages and Combinatorics 12(1-2), 25–47 (2007)
3. Ciobanu, G., Pan, L., Păun, Gh., Pérez-Jiménez, M.J.: P systems with minimal parallelism. Theoretical Computer Science 378(1), 117–130 (2007)
4. Lecture Notes in Computer Science;E. Csuhaj-Varjú,2012
5. Gutiérrez-Naranjo, M.A., Pérez-Jiménez, M.J., Riscos-Núñez, A.: On the degree of parallelism in membrane systems. Theoretical Computer Science 372(2-3), 183–195 (2007)