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- van der Velde, Jaap (author), Pinkster, Jakob (author), Keuning, J.A. (author) conference paper 1999
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- Porsius, J.J. (author), Boonstra, H. (author), Keuning, J.A. (author) conference paper 1998
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- Keuning, Lex J.A. (author), Sonnenberg, Uco B. (author) conference paper 1998
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- Porsius, J.J. (author), Boonstra, H. (author), Keuning, J.A. (author) conference paper 1998
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- Keuning, Lex J.A. (author) conference paper 1998
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- Keuning, Lex J.A. (author) conference paper 1998
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- Keuning, Lex J.A. (author) conference paper 1998
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- Plante, Merel (author), Toxopeus, Serge (author), Blok, Jan (author), Keuning, Alexander (author) conference paper 1998
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- Keuning, Lex J.A. (author), Pinkster, Jakob (author) conference paper 1997
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- Keuning, Lex J.A. (author) conference paper 1997
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- Ooms, J. (author), Keuning, J.A. (author) conference paper 1997
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- Keuning, Lex J.A. (author), Onnink, R. (author), Versluis, A. (author), van Gulik, A.A.M. (author) conference paper 1997
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- Keuning, Lex J.A. (author), Binkhorst, Barend J. (author) conference paper 1997
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- Keuning, Lex J.A. (author) conference paper 1997
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- Keuning, Lex J.A. (author) conference paper 1996
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- Keuning, Lex J.A. (author) conference paper 1995
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- Keuning, Lex J.A. (author) conference paper 1995
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- Keuning, Lex J.A. (author) conference paper 1993
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- Keuning, Lex J.A. (author), van Terwisga, Peter F. (author), Adegeest, Leon J.M. (author) conference paper 1993
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- Keuning, Lex J.A. (author) conference paper 1992