H. Olanrewaju, J. Purswell, S. Collier, and S. Branton, “Effects of Light Ingress through Ventilation Fan Apertures on Selected Blood Variables of Male Broilers”, Int. J. Poult. Sci., vol. 16, no. 8, pp. 288–295, Jul. 2017, doi: 10.3923/ijps.2017.288.295.