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- Keuning, Lex J.A. (author) journal article 2000
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- Keuning, Lex J.A. (author) report 2000
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- Keuning, Lex J.A. (author) conference paper 2000
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- van der Velde, Jaap (author), Pinkster, Jakob (author), Keuning, J.A. (author) conference paper 1999
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- Keuning, Lex J.A. (author), Sonnenberg, Uco B. (author) report 1999
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- Keuning, Lex J.A. (author), van Gulik, A.A.M. (author) report 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) report 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) report 1997
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- Keuning, Lex J.A. (author) report 1997
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