Ekong, M. B., Peter, A. I., & Ekpene, U. U. (2015). Co-administration of Rauwolfia vomitoria with Gongronema latifolium or Vernonia amygdalina on spatial learning, memory, and some bio-molecules. Asian Journal of Medical Sciences, 7(1), 82–87. https://doi.org/10.3126/ajms.v7i1.11156