Kalafova, A., M. Capcarova, C. Hrncar, P. Petruska, E. Tusimova, J. Kopecky, and J. Weis. “METABOLIC EFFECT OF CITRIC ACID IN BROILER CHICKENS”. Journal of Microbiology, Biotechnology and Food Sciences, vol. 3, no. special issue 2 (Biotechnology), Feb. 2014, pp. 110-2, https://office2.jmbfs.org/index.php/JMBFS/article/view/7633.