S. KANT, Y. PAL, R. A. LEGHA, S. K. RAVI, T. R. TALLURI, and T. SHARMA, “Supplementation of caffeine to extender improves post-thaw seminal attributes of Poitou donkey semen”, Indian J of Anim Sci, vol. 91, no. 3, pp. 182–187, Aug. 2021, doi: 10.56093/ijans.v91i3.114141.