2005, Article / Letter to editor (Transportation Research Record : Journal of the Transportation Research Board, vol. 1926, iss. 1926, (2005), pp. 126-134)
2005, Article in monograph or in proceedings (Acker, Van V.; Witlox, F. (ed.), De Belgische Geografendagen: Mobiliteit, Maatschappij en Milieu in Kaart Gebracht, pp. 73-78)
2004, Article in monograph or in proceedings (Bovy, P.H.L. (ed.), A World of Transport, Infrastructure and Logistics, Proceedings of the 8th TRAIL Congress 2004, pp. 1-15)
2004, Article in monograph or in proceedings (Bovy, P. (ed.), A World of Transport, Infrastructure and Logistics. Proc.Suppl. 8th TRAIL Congress, pp. 1-17)
2004, Part of book or chapter of book (C.A. Brebbia & L.C. Wadhwa (ed.), Urban Transport X: Urban Transport and the Environment in the 21st Century, pp. 53-62)
2004, Article in monograph or in proceedings (Thissen, W.A.H.; Wieringa, P.; Pantic, M. (ed.), Proc. IEEE Int.Conf. on Systems, Ma & Cybernetics, pp. 1-13)
2003, Part of book or chapter of book (Sucharov, L.J.; Brebbia, C.A. (ed.), Urban Transport IX: Urban Transport and the Environment in the 21st Century, pp. 43-52)
2002, Part of book or chapter of book (Sucharov, L.J.; Brebbia, C.A.; Benitez, F. (ed.), Urban Transport VIII: Urban Transport and the Environment in the 21st Century, pp. 417-426)
2001, Article in monograph or in proceedings (R. Zonneberg (ed.), Wie doet wat? Over de weerbarstige werkelijkheid van marktwerking en decentralisatie, pp. 213-232)