Olajide Oloyede. “ 6 - An Exploration of the Philosophy and Environment of a South African Randomized, Double-Blind, Placebo-Controlled Trial of Lessertia Frutescens”. African Sociological Review, vol. 15, no. 1, Oct. 2011, pp. 109-23, doi:10.57054/asr.v15i1.3874.