Cognitive Ergonomics of Multi-Agent Systems: Observations, Principles and Research Issues. - Karel Hurts; Paul de Greef (EWHCI, 1994)

Acquiring Arithmetic Knowledge in a Computer-Based Learning Environment for Long Division. - Kees van Putten; Karel Hurts (ICLS, 1996)

Building cognitive support for the learning of long division skills using progressive schematization: Design and empirical validation. - Karel Hurts (Comput. Educ., 2008)