- document
- Van der Zwaag, S. (author) journal article 1981
- document
- Van der Zwaag, S. (author), Hagan, J.T. (author), Field, J.E. (author) journal article 1980
- document
- Field, J.E. (author), Gorham, D.A. (author), Hagan, J.T. (author), Matthewson, M.J. (author), Swain, M.V. (author), Van der Zwaag, S. (author) conference paper 1979