Singh, Harmeet, et al. “Sodium, Potassium and Electrical Conductivity in Plasma, Milk, Urine and Saliva at Different Stages of Lactation in Buffaloes”. The Indian Journal of Animal Sciences, vol. 74, no. 12, Jan. 2011, https://epubs.icar.org.in/index.php/IJAnS/article/view/3663.