1. Akaike, H. (1973). Information theory as an extension of the maximum likelihood principle in Proceedings of the Second International Symposium on Information Theory, B. N. Petrov, and F. Csaki, (Eds.) Pages 267–281.
2. Rhythm, timing and the timing of rhythm;Arvaniti;Phonetica,2009
3. A study of two English nuclear tones;Ashby;Language and Speech,1978
4. Bates, D., Maechler, M., & Bolker, B. (2012). lme4: Linear mixed-effects models using S4 classes. R package version 0.999375-42
5. Beckman, M., & Ayers Elam, G. (1997). Guidelines for ToBI labeling, version 3. Ohio State University.