Wongsuthavas, S.; Yuangklang, C.; Vasupen, K.; Mitchaothai, J.; Srenanual, P.; Beynen, A. C. Energy Expenditure by Broiler Chickens Fed Diets Containing Various Blends of Beef Tallow and Soybean Oil. Int. J. Poult. Sci. 2007, 6 (11), 796–799. https://doi.org/10.3923/ijps.2007.796.799.