- document
- Bauer, R.A. (author), Smulders, R. (author), Becht, J.G.M. (author), Van der Put, P.J. (author), Schoonman, J. (author) journal article 1989
- document
- Bauer, R.A. (author), Smulders, R. (author), Geus, E.R. (author), Van der Put, P.J. (author), Becht, J.G.M. (author), Schoonman, J. (author) conference paper 1988