Kadim, I.; Al-Qamshui, B.; Mahgoub, O.; Al-Marzooqi, W.; Johnson, E. Effect of Seasonal Temperatures and Ascorbic Acid Supplementation on Performance of Broiler Chickens Maintained in Closed and Open-Sided Houses . Int. J. Poult. Sci. 2008, 7 (7), 655–660. https://doi.org/10.3923/ijps.2008.655.660.