- document
- Van Gent, H.A. (author), Nijkamp, P. (author), Rodenburg, C.A. (author) book 1998
- document
- Baaijens, S. (author), Bruinsma, F. (author), Nijkamp, P. (author), Peeters, P. (author), Peters, P. (author), Rietveld, P. (author) book 1997
- document
- Priemus, H. (author), Nijkamp, P. (author) book 1994