T. Settle, S. Leonard, E. Falkenstein, N. Fix, K. V. Dyke, and H. Klandorf, “Effects of a Phytogenic Feed Additive Versus an Antibiotic Feed Additive on Oxidative Stress in Broiler Chicks and a Possible Mechanism Determined by Electron Spin Resonance”, Int. J. Poult. Sci., vol. 13, no. 2, pp. 62–69, Jan. 2014, doi: 10.3923/ijps.2014.62.69.