Perumal, P. “Exposure of Estrus Female and Its Urine Improves Semen Quality Profiles and Freezabilityin Mithun”. International Journal of Bio-Resource and Stress Management, vol. 9, no. Dec, 6, Dec. 2018, pp. 745-53, https://www.ojs.pphouse.org/index.php/IJBSM/article/view/3780.