- document
- Wichers, Jan E.W. (author) conference paper 2003
- document
- Wichers, Jan E.W. (author) conference paper 2000
- document
- Wichers, Jan E.W. (author) conference paper 1991
- document
- Pinkster, Jo A. (author), Wichers, J.E.W. (author) conference paper 1987
- document
- Wichers, Jan E.W. (author) conference paper 1979
- document
- Wichers, Jan E.W. (author) conference paper 1979
- document
- Wichers, Jan E.W. (author) conference paper 1976