Isaac Kingsley Amponsah, Francis Ackah Armah, John Alake, Benjamin Kingsley Harley, Elikplim Kwesi Ampofo, Evelyn Asante-Kwatia, Aglomasa Bill Clinton, Benjamin Amoani, and Isaac Tabiri Henneh. “In-Vitro Anti-Cercarial Activity of Extracts and Steroidal Alkaloids from the Stem Bark of Holarrhena Floribunda (G. Don) Dur. & Schinz”. International Journal of Phytomedicine, vol. 12, no. 3, Sept. 2020, pp. 69-78, https://ijp.arjournals.org/index.php/ijp/article/view/639.