Groen,G.& Resnick,L.B.(1977).Can preschool children invent addition algorithms?Joural of Education Psychology,69,645-652.
Groen,G.& Resnick,L.B.(1977).Can preschool children invent addition algorithms?Joural of Education Psychology,69,645-652.
刘范,《中国现时的发展心理学——兼谈中国3—12岁儿童数概念和运算能力发展的初步研究》,《心理学报》,1981年第2期。