Saffran, PhD, J. From Flexibility to Constraint: The Contrastive Use of Lexical Tone in Early Word Learning.
Hay JF, Graf Estes K, Wang T, Saffran JR. (2015) From flexibility to constraint: the contrastive use of lexical tone in early word learning. Child Development, 86(1):10-22. doi: 10.1111/cdev.12269.