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Moore TR, Trofymow JA, Siltanen M, Kozak LM.Moore TR, et al. Among authors: trofymow ja.Oecologia. 2008 Aug;157(2):317-25. doi: 10.1007/s00442-008-1076-0. Epub 2008 Jun 17.Oecologia. 2008.PMID: 18560899
Preston CM, Trofymow JA, Niu J, Fyfe CA.Preston CM, et al. Among authors: trofymow ja.J Environ Qual. 2002 Mar-Apr;31(2):402-13.J Environ Qual. 2002.PMID: 11931427