Soltan, M. et al. 2012. Effect of Dietary Chromium Supplementation on Growth Performance, Rumen Fermentation Characteristics and Some Blood Serum Units of Fattening Dairy Calves under Heat Stress. Pakistan Journal of Nutrition. 11, 9 (Aug. 2012), 849–854. DOI:https://doi.org/10.3923/pjn.2012.849.854.