D. Gildea, Optimal parsing strategies for linear context-free rewriting systems, Human Language Technologies: The 11th Annual Conference of the North American Chapter of the Association for Computational Linguistics; Proceedings of the Main Conference, 2010.

C. Gómez-rodríguez and G. Satta, An optimal-time binarization algorithm for linear context-free rewriting systems with fan-out two, Proceedings of the Joint Conference of the 47th Annual Meeting of the ACL and the 4th International Joint Conference on Natural Language Processing of the AFNLP, pp.985-993, 2009.

C. Gómez-rodríguez, M. Kuhlmann, G. Satta, and D. J. Weir, Optimal reduction of rule length in linear context-free rewriting systems, Proceedings of the North American Chapter of the Association for Computational Linguistics -Human Language Technologies Conference (NAACL'09:HLT), 2009.

M. A. Harrison, Introduction to Formal Language Theory, 1978.

K. Aravind, L. S. Joshi, and . Levy, Constraints on local descriptions: Local transformations, SIAM Journal of Computing, 1977.

M. Kuhlmann and G. Satta, Treebank grammar techniques for non-projective dependency parsing, Proceedings of the 12th Meeting of the European Chapter of the Association for Computational Linguistics, 2009.

W. Maier and T. Lichte, Characterizing discontinuity in constituent treebanks, Proceedings of the 14th Conference on Formal Grammar (FG 2009), 2009.

W. Maier and A. Søgaard, Treebanks and mild context-sensitivity, Proceedings of the 13th Conference on Formal Grammar, pp.61-76, 2008.

O. Rambow and G. Satta, Independent parallelism in finite copying parallel rewriting systems, Theoretical Computer Science, vol.223, pp.87-120, 1999.

G. Satta, Recognition of linear context-free rewriting systems, Proceedings of the 30th Meeting of the Association for Computational Linguistics (ACL'92), 1992.

H. Seki, T. Matsumura, M. Fujii, and T. Kasami, On multiple context-free grammars, Theoretical Computer Science, vol.88, pp.191-229, 1991.

K. Vijay-shanker, D. J. Weir, and A. K. Joshi, Characterizing structural descriptions produced by various grammatical formalisms, Proceedings of the 25th Meeting of the Association for Computational Linguistics (ACL'87), 1987.

J. David and . Weir, Linear context-free rewriting systems and deterministic tree-walk transducers, Proceedings of the 30th Meeting of the Association for Computational Linguistics (ACL'92), 1992.