Mukherjee, Upasana, Carin Napier, and Wilna 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 34 (September 22, 2021): S9-S14. Accessed January 27, 2022. http://www.sajcn.co.za/index.php/SAJCN/article/view/1560.