K. Ofokansi, C. Esimone, and C. Anele, “Evaluation of the <i>in vitro</i> combined antibacterial effect of the leaf extracts of <i>Bryophyllum pinnatum</i> (Fam: crassulaceae) and <i>Ocimum gratissimum</i> (Fam: labiatae)”, pprj, vol. 9, no. 1, pp. 23–27, Apr. 2006.