A. Afzal, M. Mahmood, I. Hussain, and M. Akhtar, “Adulteration and Microbiological Quality of Milk (A Review)”, Pak. J. Nutr., vol. 10, no. 12, pp. 1195–1202, Nov. 2011, doi: 10.3923/pjn.2011.1195.1202.