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Memon FA, Butler D.Memon FA, et al. Among authors: butler d.Sci Total Environ. 2002 Aug 5;295(1-3):115-29. doi: 10.1016/s0048-9697(02)00056-6.Sci Total Environ. 2002.PMID: 12186281
Vlasopoulos N, Memon FA, Butler D, Murphy R.Vlasopoulos N, et al. Among authors: butler d.Sci Total Environ. 2006 Aug 15;367(1):58-70. doi: 10.1016/j.scitotenv.2006.03.007. Epub 2006 May 2.Sci Total Environ. 2006.PMID: 16650885