Srikhun, T., et al. “Effects of Polyphenols Extracted from Tamarind (Tamarindus Indica L.) Seed Coat on Body Weight, White Blood Cells, Bursa of Fabricius and NDV-HI Titer of Broilers under Chronic Heat Stress”. International Journal of Poultry Science, vol. 9, no. 10, Sept. 2010, pp. 988–995, https://doi.org/10.3923/ijps.2010.988.995.