Purswell, J., Davis, J., Luck, B., Kim, E., Olanrewaju, H., Kiess, A., & Branton, S. (2011). Effects of Elevated Carbon Dioxide Concentrations on Broiler Chicken Performance from 28 to 49 Days. International Journal of Poultry Science, 10(8), 597–602. https://doi.org/10.3923/ijps.2011.597.602