Mukherjee, U., C. Napier, and W. Oldewage-Theron. “Drink Clean, Safe Water And/or Other Fluids Through-Out the Day Even If You Do Not Feel Thirsty: A Food-Based Dietary Guideline for the Elderly in South Africa”. South African Journal of Clinical Nutrition, Vol. 34, Sept. 2021, pp. S9-S14, http://sajcn.co.za/index.php/SAJCN/article/view/1560.