1.
Brunk J, Caporali M, Rubegni E. 3is: Enhancing Learning and Teaching Activity through the Manipulation of Objects. Je-LKS [Internet]. 2009Nov.16 [cited 2020Sep.27];3(2). Available from: https://www.je-lks.org/ojs/index.php/Je-LKS_EN/article/view/34