1. Les débuts de la phrase dans le langage de l'enfant;Guillaume;Journal de Psychologie,1927
2. Language in the two-year old
3. Gershkoff-Stowe L. & Smith L. B. (1991). Changes in pointing and labeling during the naming explosion. Poster presented at the biennial meeting of the Society for Research in Child Development, Seattle, WA.
4. Lempers J. , Flavell E. & Flavell J. (1976). The development in very young children of tacit knowledge concerning visual perception. Genetic Psychology Monographs 4.