The Developmental Damage to Children as a Result of the Violation of their Rights
In: Willems, J.C.M. (Ed.). Developmental and Autonomy Rights of Children; Empowering Children, Caregivers and Communities.Antwerpen/Groningen/Oxford: Intersentia, 2002, second revised editon 2007.

The Conquered Giant: The use of Computer in play therapy
In: F.J. Maarsse; A.E. Akkerman; A.N. Brand & L.J.M. Mulder (Eds.). Clinical assessment, computerized methods and instrumentation. CIP7. Lisse: Swets & Zeitlinger, 2003.
 

Listening to children
In: Child care in practice. Belfast: Northern Ireland Journal of Multidisciplinary Child Care Practice, Volume 6 No. 3, p. 229-239, July 2000.

About boys: The core of the matter
In: Educating boys, the good news. Dit boek is de weerslag van de 4th Biennial Working with boys, Building Fine Men Conference in Melbourne.
Callaghan, N.S.W.: University of Newcastle, Family Action Centre, pag. 157-168, 2006. 

From parent to group parent. Parenthood (and Upbringing Pledge) in the Virtual Environment.

In: Hans Van Crombrugge, Wouter Vandenhole, Jan C.M. Willems (Eds.). Shared Pedagogical Responsibility. Antwerpen/Oxford/Portland: Intersentia, 2008.

The virtual environment from a developmental perspective

In: Belinda Heys, Michiel Matthes, Patrice Sullivan (Red.). Improving the Quality of Childhood in Europe 2013.
 ECSWE: East Sussex, U.K., pag 102-157. 2013.

Reasoning about Adaptive Dynamical Systems in the Analysis of Eating Regulation Disorders

In: Proceedings of the 25th Annual Conference of the Cognitive Science Society, Mahwah, N.J.: Lawrence Erlbaum Associates Inc., 2003.