5Wynn, K. Psychological foundations of number:numerical competence in human infants [J]. Trends in Cognitive Sciences,1998 ,Vol. 2(8) ,pp.296-303.
6Wynn, K, Chilren's understanding of counting[J].Cognition,1990,Vol. 36(2) ,pp. 155-193.
7Gelman, R, Epigenetic foundations of knowledge structures:initial and transcendent constructions. In S. Carey ,& R.Gelman (Ed.), The epigenesis of mind:essays on biology and cognition[M]. Hillsdale ,NJ :Erlbaum,1991.
8Miller K. F..Smith,C, M. ,Zhu, J. ,& Zhang H, Preshcool origins of cross- national differences in mathematical competences:The role of number- naming systems [J].Psychological Science,1995,6:pp. 56-60.
9Campbell J. I. D. , Xue Q. L. Cognitive arithmetic across cultures [J]. Journal of experimental psychology :general, 2001,Vol. 130(2) ,pp. 299-315.
10Reys, R. E. Computation versus number sense [J].Mathematics Teaching in the Middle School. 1998,Vol, 4(2),pp.110-112.
