1998 · M. van der Kamp, Laurenz Veendrick · University of Groningen research database (University of Groningen / Centre for Information Technology) · 3
2006 · M. van der Kamp, Johannes E. H. Van Luit, et al. · University of Groningen research database (University of Groningen / Centre for Information Technology) · 2
2006 · Johannes E. Hans Van Luit, M. van der Kamp, et al. · University of Groningen research database (University of Groningen / Centre for Information Technology) · 2