Roy C.
Major. Foreign Accent: The Ontogeny and Phylogeny of Second Language Phonology.
Roy
C. Major. Stress and Rhythm of Brazilian Portuguese. Language(Journal of the Linguistic Society of America)P.259
Roy
C. Major. Foreign Accent. Teaching Language as a Second or Foreign Language.
Vol. 5, No.4, R-3. March 2002.
http://www-writing.berkeley.edu/TESL-EJ/ej20/r3.html
Second Language Phonology
http://www.benjamins.com/cgi-bin/t_bookview.cgi?bookid=LALD_17&f=1