Renqvist, U. H., De Vreeze, A. C., & Evenhuis, B. (1978). The Effect of Traditional Cooking Methods on Carotene Content in Tropical Leafy Vegetables. The Indian Journal of Nutrition and Dietetics, 15(5), 154–158. Retrieved from https://informaticsjournals.co.in/index.php/ijnd/article/view/12207