- document
- Flikkema, Maarten B. (author), Holtrop, Jan (author), van Terwisga, Tom J.C. (author) conference paper 2006
- document
- Holtrop, J. (author) journal article 2001
- document
- Holtrop, J. (author) conference paper 2000
- document
- Holtrop, J. (author) journal article 1984
- document
- Holtrop, J. (author) conference paper 1978
- document
- Holtrop, J. (author) journal article 1978