Owusu, G., M. Antwi-Adjei, and I. T. Henneh. “Pentobarbitone-Induced Sleeping Time and Sub-Acute Toxicity Studies of Trichilia Monadelpha Aqueous Extract”. International Journal of Basic & Clinical Pharmacology, vol. 5, no. 6, Dec. 2016, pp. 2352-6, doi:10.18203/2319-2003.ijbcp20164088.