Erko, B., T. Gemetchu, G. Medhin, and H. Birrie. “Reinfection of School Children With Schistosoma Mansoni in the Finchaa Valley, Western Ethiopia”. The Ethiopian Journal of Health Development, vol. 11, no. 3, Mar. 2017, https://ejhd.org/index.php/ejhd/article/view/1003.