1. Allen, J. Natural Language Understanding. The Benjamin / Cummings Publ., Amsterdam, Bonn, Sidney, Singapore, Tokyo, Madrid, 1995.
2. Cortés García, U., J. Béjar Alonso, A. Moreno Ribas. Inteligencia Artificial. Edicions UPC, Barcelona, 1993.
3. Grishman, R. Computational linguistics. An introduction. Cambridge University Press, 1986.
4. Jurafsky, D., J. H. Martin. Speech and Language Processing: An Introduction to Natural Language Processing, Computational Linguistics, and Speech Recognition. Prentice-Hall, 2000; see www.cs.colorado.edu/~martin/slp.html.
5. Manning, C., H. Schütze, Foundations of Statistical Natural Language Processing, MIT Press, 1999; www-nlp.stanford.edu/fsnlp.
6. Mel’čuk, I. A. Dependency Syntax: Theory and Practice. State University of New York Press, NY, 1988.
7. Pollard, C., and I. A. Sag. Head-driven Phrase Structure grammar. CSLI Publ., Stanford. University of Chicago Press, Chicago and London, 1994.
8. Sag, I. A., and T. Wasow. Syntactic theory: Formal Introduction. CSLI Publ., Stanford University of Chicago Press, Chicago and London, 1999; see also http://hpsg.stanford.edu/hpsg.
9. Sell, P. Lectures on Contemporary Syntactic Theories. CSLI Publ., Stanford, 1985.