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- Bos, P. (author), Meulenberg, R. (author), Pronk, J.T. (author), Hazeu, W. (author), Kuenen, J.G. (author) conference paper 1994
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- Kuenen, J.G. (author), Pronk, J.T. (author), Hazeu, W. (author), Meulenberg, R. (author), Bos, P. (author) conference paper 1993