Chinwe U., A. “BITTER HERBS OF EASTERN NIGERIA (GONGRONEMA LATIFOLIUM, VERNONIA AMYGDALINA AND VITEX DONIANA): A REVIEW”. African Journal of Traditional, Complementary and Alternative Medicines, vol. 15, no. 3, May 2018, pp. 47-56, doi:10.21010/ajtcamv15i3.6.