Brown, R. (1973). A first language: The early stages. Cambridge, MA: Harvard University Press.
Clahsen, H., Bartke, S., & Göllner, S. (1997). Formal features in impaired grammars: A comparison of English and German SLI children. Journal of Neurolinguistics, 10, 151-171.
Clark, E.V. (2009). First language acquisition: Second edition. Cambridge, MA: Cambridge University Press.
Collins, B., & Mees, I. M. (2003). The phonetics of English and Dutch: Fifth revised edition. Boston, MA: Brill.
Delahunty, G.P., & Garvey, J.J. (2010). The English language: From sound to sense. Fort Collins, CO: The WAC Clearinghouse and Parlor Press.
Dodd, B., Holm, A., Hua, Z., & Crosbie, S. (2003). Phonological development: A normative study of British English-speaking children. Clinical Linguistics and Phonetics, 17(8), 617–643.
Gopnik, M. (1990). Feature blindness: A case study. Language Acquisition, 1, 139-164.
Gopnik, M., & Crago, M. B. (1991). Familial aggregation of a developmental disorder. Cognition, 39, 1-50.
Lely, H. K. J. van der, & Battell, J. (2003). Wh-movement in children with grammatical SLI: A test of the RDDR hypothesis. Language, 79, 153-181.
Wexler, K., Schütze, C., & Rice, M. (1998). Subject case in children with SLI and unaffected controls: Evidence for the Agr/Tns Omission Model. Language Acquisition, 7, 317-344.