共 21 条
[1]
Brissiaud R., 1992, PATHWAYS NUMBER CHIL, P41
[2]
Dohrmann C., 2010, THESIS PH SCHWABISCH
[4]
Engestrom Y., 1991, ACTIVITY THEORY, V7-8, P6
[5]
Flexer R. J., 1986, ARITHMETIC TEACHER, V2, P5
[6]
Fuhrer L., 1997, PADAGOGIK MATHEMATIK, P46
[7]
Harris A., 2009, P 9 INT C COMP SUPP, V1, P335, DOI DOI 10.3115/1600053.1600104
[8]
Kempinsky H., 1921, SO RECHNEN WIR BIS 1
[9]
Klein F., 1928, SERIES COMPREHENSIVE
[10]
Krauthausen G., 1995, MIT KINDERN RECHNEN, P87