Osonwa, U.E. et al. 2023. Preservative efficacy of the combination of essential oils of Cymbopogon citratus (DC.) Stapf (Poaceae) and Citrus sinensis (l.) Osbeck (Rutaceae) in a cream formulation. West African Journal of Pharmacy. 28, 2 (Dec. 2023), 96–114. DOI:https://doi.org/10.60787/wapcp-28-2-160.