1. A direct realist view of cross-language speech perception;Best,1995
2. Nonnative and second-language speech perception: Commonalities and complementarities;Best,2007
3. Boersma, P., & Weenink, D. (2021). Praat: doing phonetics by computer [Computer program], version 6.1.43. http://www.praat.org/.
4. The impact of allophony vs contrast on speech perception;Boomershine,2008
5. Phonetics and the teaching of pronunciation: A system description of English phonology;Catford,1987