1999 · Walter T. Mayers, Bernardo Ruíz Delgado, et al. · University of Groningen research database (University of Groningen / Centre for Information Technology) · 28
1996 · R.J.J.M. Jorna, Henk W.M. Gazendam, et al. · University of Groningen research database (University of Groningen / Centre for Information Technology) · 12
1996 · Wout van Wezel, R.J.J.M. Jorna, et al. · University of Groningen research database (University of Groningen / Centre for Information Technology) · 8
2004 · J. Waalkens, R.J.J.M. Jorna, et al. · University of Groningen research database (University of Groningen / Centre for Information Technology) · 6
2004 · J. Waalkens, R.J.J.M. Jorna, et al. · University of Groningen research database (University of Groningen / Centre for Information Technology) · 5
2006 · Henk W.M. Gazendam, R.J.J.M. Jorna, et al. · University of Groningen research database (University of Groningen / Centre for Information Technology) · 4
2001 · R.J.J.M. Jorna, S. Tsuchiya, et al. · University of Groningen research database (University of Groningen / Centre for Information Technology) · 4
2008 · Nanda Wijermans, R.J.J.M. Jorna, et al. · University of Groningen research database (University of Groningen / Centre for Information Technology) · 3
2003 · John A. Michon, Jen Jackson, et al. · University of Groningen research database (University of Groningen / Centre for Information Technology) · 3
2006 · Niels Faber, Kristian Peters, et al. · University of Groningen research database (University of Groningen / Centre for Information Technology) · 2