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Feilberg A, Nielsen T.Feilberg A, et al. Among authors: nielsen t.Environ Sci Technol. 2001 Jan 1;35(1):108-13. doi: 10.1021/es990834l.Environ Sci Technol. 2001.PMID: 11351991
Sverdrup LE, Nielsen T, Krogh PH.Sverdrup LE, et al. Among authors: nielsen t.Environ Sci Technol. 2002 Jun 1;36(11):2429-35. doi: 10.1021/es010180s.Environ Sci Technol. 2002.PMID: 12075800