Saha, S., U. Mukherjee, M. Miller, L.- ling Peng, C. Napier, H. Grobbelaar, and W. Oldewage-Theron. “Food and Beverages Promoting Elderly Health: Six Food-Based Dietary Guidelines to Plan Good Mixed Meals for Elderly South Africans”. South African Journal of Clinical Nutrition, Vol. 34, Sept. 2021, pp. S51-S63, http://sajcn.redbricklibrary.com/index.php/SAJCN/article/view/1565.