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- Van Niel, E.W.J. (author), Robertson, L.A. (author), Kuenen, J.G. (author) journal article 1995
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- Van Niel, E.W.J. (author), Robertson, L.A. (author), Kuenen, J.G. (author) journal article 1993
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- Van Niel, E.W.J. (author), Arts, P.A.M. (author), Wesselink, B.J. (author), Robertson, L.A. (author), Kuenen, J.G. (author) journal article 1993
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- Van Niel, E.W.J. (author), Robertson, L.A. (author), Cox, R.P. (author), Kuenen, J.G. (author) journal article 1992
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- Van Niel, E.W.J. (author), Braber, K.J. (author), Robertson, L.A. (author), Kuenen, J.G. (author) journal article 1992
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- Geraats, S.G.M. (author), Hooijman, C.M. (author), Van Niel, E.W.J. (author), Obertson, L.A. (author), Heijnen, J.J. (author), Luyben, A.M. (author), Kuenen, J.G. (author) journal article 1990
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- Robertson, L.A. (author), Van Niel, E.W.J. (author), Torremans, R.A.M. (author), Kuenen, J.G. (author) journal article 1988
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