Shahzad, Qaisar, et al. “Serum Concentration of Calcium, Inorganic Phosphorus and Magnesium in Cyclic, Non Cyclic and Repeat Breeder Buffaloes”. Buffalo Bulletin, vol. 35, no. 1, Mar. 2018, pp. 73-76, https://kuojs.lib.ku.ac.th/index.php/BufBu/article/view/1134.