1. Abraham, S.: Some questions of phrase structure grammars I. Comput. Linguist. 4, 61–70 (1965)
2. Adleman, L.M.: Molecular computation of solutions to combinatorial problems. Sci. New Series 266(5187), 1021–1024 (1994)
3. Berstel, J., Boasson, L., Fagnot, I.: Splicing systems and the Chomsky hierarchy. Theoret. Comput. Sci. 436, 2–22 (2012)
4. Ceterchi, R., Subramanian, K.G.: Grammar systems with context-free rewriting and flat splicing. In: Gheorghe, M., et al. (ed.) Multidisciplinary Creativity, pp. 221–227. Spandugino, Bucuresti (2015)
5. Csuhaj-Varju, E., Dassow, J., Kelemen, J., Păun, G.: Grammar systems: a grammatical approach to distribution and cooperation. Gordon and Breach Science Publishers (1994)