E. Nnanga Nga, L. Soppo, Y. Dassaou, N. Nyangono, M. Benga, and S. Ondoua, “Quality Assessment of Analgesics Paracetamol and Ibuprofen for Sale in the Douala City (Cameroon)”, Health Sci. Dis., vol. 21, no. 1, Dec. 2019.