Nirmala, P. S., E. Mathew, and R. P. Devadas. “Effect of Dietary Proteins on Carotene Utilisation by Albino Rats”. The Indian Journal of Nutrition and Dietetics, vol. 3, no. 3, July 1966, pp. 81-84, https://informaticsjournals.com/index.php/ijnd/article/view/14359.