Are User Models Necessary in Hypermedia Design? - Licia Calvi; Walter Geerts (IWHD, 1995)

Structuring Collaboration Scripts - Optimizing Online Group Work on Classroom Dilemmas in Teacher Education. - Hans G. K. Hummel; Walter Geerts; Aad Slootmaker; Derek Kuipers; Wim Westera (CSEDU (3), 2014)

Collaboration scripts for mastership skills: online game about classroom dilemmas in teacher education. - Hans G. K. Hummel; Walter Geerts; Aad Slootmaker; Derek Kuipers; Wim Westera (Interact. Learn. Environ., 2015)