Hrnčár, C. ., and J. . Bujko. “Effect of Different Levels of Green Tea (Camellia Sinensis) on Productive Performance, Carcass Characteristics and Organs of Broiler Chickens”. Potravinarstvo Slovak Journal of Food Sciences, vol. 11, no. 1, Oct. 2017, pp. 623-8, doi:10.5219/809.