1. Fonologia Española;Alarcos Llorach,1950
2. Linguistic mechanisms underlying child speech;Bellugi,1968
3. Imitation in language development: if, when and why;Bloom;Cognitive Psychology,1975
4. On specifying a system for transcribing consonants in child language: A working paper with examples from American English and Mexican Spanish;Bush,1973
5. Aspects of the theory of syntax;Chomsky,1965