Ely the explorer: a multi-user interactive play system to promote collaborative learning. - Diana Africano; Staffan Eriksson; Kent Lindbergh; Peter Lundholm; Fredrik Nilbrink (IDC, 2003)

Designing tangible interfaces for children's collaboration. - Diana Africano; Sara Berg; Kent Lindbergh; Peter Lundholm; Fredrik Nilbrink; Anna Persson (CHI Extended Abstracts, 2004)