Science, Vol. 308, No. 5719. (8 April 2005), pp. 214-216.
Developmental Science, Vol. 8, No. 1., 44.
Cognition, Vol. 57, No. 3. (December 1995), pp. 241-269.
Child Development, Vol. 65, No. 4. (1994), pp. 1228-1238.
Cognition, Vol. 40, No. 3. (September 1991), pp. 203-218.
Child Development, Vol. 6, No. 3. (1991), pp. 468-483.
British Journal of Developmental Psychology, Vol. 19, No. 3. (2001), pp. 413-432.
Developmental Psychology, Vol. 34, No. 1. (January 1998), pp. 161-174.
Cognition, Vol. 39, No. 1. (April 1991), pp. 51-69.
Child Development, Vol. 74, No. 1. (February 2003), pp. 179-188.
Cognition, Vol. 57, No. 3. (December 1995), pp. 241-269.
Trends in Cognitive Sciences, Vol. 9, No. 10. (October 2005), pp. 462-463.
Cognitive Development, Vol. 9, No. 4. ( 1994), pp. 377-395.