Xu, Jj, Cz Ren, Ss Wang, Dd Liu, Lq Cao, and Jp Tao. “Protection Efficacy of Multivalent Egg Yolk Immunoglobulin Against Eimeria Tenella Infection in Chickens.”. Iranian Journal of Parasitology 8, no. 3 (1): 449-458. Accessed October 20, 2019. http://ijpa.tums.ac.ir/index.php/ijpa/article/view/470.