Abdulrab, A., A. Salem, F. Algobati, S. Saleh, K. Shibani, and R. Albuthigi. “Effect of School Based Treatment on the Prevalence of Schistosomiasis in Endemic Area in Yemen.”. Iranian Journal of Parasitology, Vol. 8, no. 2, 1, pp. 219-26, http://ijpa.tums.ac.ir/index.php/ijpa/article/view/502.