A. Yahaya, O. Adeniji, O. Okoh, S. Songca, and A. Okoh, “Distribution of polychlorinated biphenyl along the course of the Buffalo River, Eastern Cape Province, South Africa, and possible health risks”, WSA, vol. 44, no. 4 October, Oct. 2018, doi: 10.4314/wsa.v44i4.09.