Nazir, Tahir, et al. “Effect of the Lactation Number During Transition Phase on Various Physico-Chemical, Compositional and Microbiological Characteristics of Bovine Colostrum”. International Journal of Livestock Research, vol. 9, no. 8, Aug. 2019, pp. 243-56, https://ijlr.org/ojs_journal/index.php/ijlr/article/view/1167.