1. Beck, Maria-Luise. 1998. L2 acquisition and obligatory head movement: English-speaking learners of German and the local impairment hypothesis. Studies in Second Language Acquisition 20.311–348.
2. Bernstein, Judith. 1993. Topics in the syntax of nominal structure across Romance. Ph.D. dissertation, CUNY.
3. Borer, Hagit and Bernhard Rohrbacher. 1997. Features and projections: arguments for the full competence hypothesis. Proceedings of the 21st Annual Boston University Conference on Language Development, ed. by Elizabeth Hughes, Mary Hughes, and Annabel Greenhill, 24–35. Somerville, MA: Cascadilla Press
4. Brisk, María Estela. 1972. The Spanish syntax of the pre-school Spanish American: the case of New Mexican five-year old children. Unpublished PhD dissertation, University of New Mexico.
5. Brisk, María Estela. 1976. The acquisition of Spanish gender by first-grade Spanish-speaking children. Bilingualism in the bicentennial and beyond, ed. Gary D. Keller, Richard V. Teschner and Silvia Viera. New York: Bilingual Press.