N. Atieno, O. Owuor, and O. Omwoyo, “Heavy metal and associated antibiotic resistance of fecal coliforms, fecal streptococci and pathogens isolated from wastewaters of abattoirs in Nairobi, Kenya”, J. App. Bioscience., vol. 64, no. 1, pp. 4858–4866, May 2013.