How indirect supportive digital help during and after solving physics problems can improve problem-solving abilities. - Henk J. Pol; Egbert G. Harskamp; Cor J. M. Suhre; Martin J. Goedhart (Comput. Educ., 2009)

The influence of student characteristics on the use of adaptive e-learning material. - J. R. van Seters; M. A. Ossevoort; Johannes Tramper; Martin J. Goedhart (Comput. Educ., 2012)