1Hahn, L. D. Primary stress and intelligibility: Research to motivate the teaching of suprasegmentals [ J 1- TESOL Quarterly, 2004, (38):201-223.
2Derwing, T. M, Rossiter, M. J. The effects of pronunciation instruction on the accuracy, fluency, and xomplexity of L2 accented speech [J]. Applied Language Learning. 2003. (13), 1-17.