Rao, K. R. S., N. Krishnappa, and V. K. Nambudripad. “Standardisation of the Method of Preparation of ’Yoghurt’ at Room Temperature”. The Indian Journal of Nutrition and Dietetics, vol. 19, no. 5, May 1982, pp. 149-52, https://informaticsjournals.com/index.php/ijnd/article/view/12928.