1. Bates, D., Maechler, M., & Bolker, B. (2012). lme4: Linear mixed-effects models using S4 classes. R package version 0.999999-0.
2. Effects of disfluencies, predictability, and utterance position on word form variation in English conversation;Bell;The Journal of the Acoustical Society of America,2003
3. What’s new, pussycat? On talking to babies and animals;Burnham;Science,2002
4. Temporal marking of accents and boundaries;Cambier-Langeveld,2000
5. Infant-directed speech: Final syllable lengthening and rate of speech;Church;Canadian Acoustics,2005