Instructional design for tele-learning. - Sanne Dijkstra; Betty A. Collis; Deniz Eseryel (J. Comput. High. Educ., 1999)

Cognitive processes in solving variants of computer-based problems used in logic teaching. - Tessa H. S. Eysink; Sanne Dijkstra; J. Kuper (Comput. Hum. Behav., 2001)