- document
- public lecture 1999
- document
- TU Delft (author) public lecture 1998
- document
- TU Delft (author) public lecture 1998
- document
- TU Delft (author) public lecture 1998
- document
- Hengst, S. (author) public lecture 1996
- document
- Hengst, S. (author) public lecture 1994
- document
- Drewry Shipping Consultants (author) public lecture 1988
- document
- public lecture 1985