Persona

Monografia (1992) Cognitive tools for learning : [proceedings of the NATO Advanced Study Institute of Mindtools: Cognitive Technologies for Modeling Knowledge, held in Enschede, the Netherlands, July 4–10, 1990]
Monografia (1996) Hypermedia learning environments : instructional design and integration
Monografia (2004) Cognitive support for learning : imagining the unknown
Monografia (2006) ICALT 2006 : sixth international conference on advanced learning technologies : 5–7 July 2006, Kerkrade, The Netherlands : proceedings