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van der Salm C, van den Toorn A, Chardon WJ, Koopmans GF.van der Salm C, et al. Among authors: koopmans gf.J Environ Qual. 2012 Jan-Feb;41(1):229-41. doi: 10.2134/jeq2011.0292.J Environ Qual. 2012.PMID: 22218191
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van der Salm C, Chardon WJ, Koopmans GF, van Middelkoop JC, Ehlert PA.van der Salm C, et al. Among authors: koopmans gf.J Environ Qual. 2009 Feb 25;38(2):751-61. doi: 10.2134/jeq2008.0068. Print 2009 Mar-Apr.J Environ Qual. 2009.PMID: 19244497
Koopmans GF, Chardon WJ, Dolfing J, Oenema O, van der Meer P, van Riemsdijk WH.Koopmans GF, et al.J Environ Qual. 2003 Jan-Feb;32(1):287-95. doi: 10.2134/jeq2003.2870.J Environ Qual. 2003.PMID: 12549568
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Koopmans GF, Chardon WJ, van der Salm C.Koopmans GF, et al.J Environ Qual. 2005 Jul 5;34(4):1446-50. doi: 10.2134/jeq2005.0028. Print 2005 Jul-Aug.J Environ Qual. 2005.PMID: 15998868