1. Limits on phonetic accuracy in foreign language speech production
2. 2) N. Trubetzkoy, Principles of Phonology, Translated by C. A. Baltaxe (University of California Press, Berkley, 1939/1969).
3. 3) J. Flege, “The production and perception of foreign language speech sounds”, in Human Communication and Its Disorders, H. Winitz, Ed. (Ablex, Norwood, 1988), p. 224.
4. 4) T. Vance, An Introduction to Japanese Phonology (State University of New York Press, New York, 1987).
5. 5) P. Ladefoged and I. Maddieson, Sounds of the World’s Languages (Blackwell, Cambridge, MA, 1996).