1. Liberman, A. M., & Studdert-Kennedy, M.Phonetic perception. Haskins Laboratories Status Reports on Speech Research, 1977,SR-50, 21–60.
2. Brown University Progress Report;P. D. Eimas,1975
3. Repp, B. H.Posner’s paradigm and categorical perception: A negative study. Haskin’s Laboratories Status Report on Speech Research, 1976,SR-45/46, 153–161.