Negash, W. ., T. . Tadesse, . G. . Alemayehu, and H. . Bedada. “Epidemiology of Small Ruminants Lungworm in Gedeb Asasa District, West Arsi Zone, Ethiopia”. Scientific Journal of Zoology, vol. 7, no. 1, Jan. 2018, pp. 88-96, http://sjournals.com/index.php/sjz/article/view/249.