Sirama, V. O., Kokwaro, J., Owuor, B., & Amir, Y. (2015). In-vitro anthelmintic activity of Vernonia amygdalina Del. (asteraceae) roots using adult Haemonchus contortus worms. International Journal of Pharmacological Research, 5(1), 1-7. https://doi.org/10.7439/ijpr.v5i1.1533