Church, R., B. Bernhardt, K. Pichora-Fuller, and R. Shi. “Infant-Directed Speech: Final Syllable Lengthening and Rate of Speech”. Canadian Acoustics, vol. 33, no. 4, Dec. 2005, pp. 13-19, https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1770.