- document
- Verhagen, S.A. (author) master thesis 2004
- document
- Verhagen, S.A. (author) conference paper 2004
- document
- Verhagen, S.A. (author) master thesis 2004
- document
- Verhagen, H.J. (author) conference paper 2001
- document
- Verhagen, J.H.G (author) conference paper 1970
- document
- Verhagen, J.H.G (author) report 1970
- document
- Verhagen, J.H.G (author) report 1967
- document
- Verhagen, J.H.G (author) report 1967
- document
- Verhagen, J.H.G. (author), van Wijngaarden, L. (author) journal article 1965
- document
- Verhagen, J.H.G (author) journal article 1965
- document
- Verhagen, J.H.G (author) report 1964