O. . ashayerizadeh, B. . Dastar, F. . Samadi, M. . Khomeiri, A. . Yamchi, and . S. . Zerehdaran, “Comparison the effect of two multi-strain probiotics and antibiotic on growth performance, carcass characteristics, gastrointestinal microbial population and hematological indices of broiler chickens”, Sci. J. Anim. Sci., vol. 3, no. 4, pp. 110-119, Apr. 2014.