2013, Part of book or chapter of book (Kok, R.; Lekkerkerk, H.; Vermeulen, P. (ed.), Versterking van innovatie. Liber Amicorum voor Ben Dankbaar, pp. 1-8)
2008, Article in monograph or in proceedings (Proceedings of the 2nd International European Forum System Dynamics and Innovation in Food Networks, pp. 215-223)