1. Elements of General Phonetics;Abercrombie,1967
2. Coarticulation resistance in English /1/;Bladon;Journal of Phonetics,1976
3. On defining coarticulation;Daniloff;Journal of Phonetics,1973
4. An Introduction to the Pronunciation of English;Gimson,1970
5. An Outline of English Phonetics;Jones,1972