J. Flege and I. Mackay, PERCEIVING VOWELS IN A SECOND LANGUAGE, Studies in Second Language Acquisition, vol.26, issue.1, pp.1-34, 2004.
DOI : 10.1017/S0272263104261010

K. Kohler, German ? Illustrations of the IPA. Handbook of the IPA, CUP, pp.86-89, 1999.

U. Hirschfeld, Bewegte Phonetik Ausspracheübungen mit französischen Schülern im Deutsch-und Englischunterricht (classes bilangues) Paris: Goethe Institut (www.goethe.de/ins, 2014.

U. Hirschfeld, K. Reinke, and E. J. Stock, Learning foreign vowels, Language and Speech, vol.46, pp.295-349, 2003.

&. Zimmerer and F. , The IFCASL corpus of French and German non-native and native read speech, Proceedings 10th Language Resources and Evaluation Conference (LREC), 2016.
URL : https://hal.archives-ouvertes.fr/hal-01293935