1. Chapter 5 – other fermented dairy products: kefir and koumiss;Singh,2017
2. Kefir and Koumiss Origin, Health Benefits and Current Status of Knowledge, Fermented Foods — Part II: Technological Interventions;Behera,2017
3. Kefir and intestinal microbiota modulation: implications in human health;Peluzio;Front. Nutr.,2021
4. Food and Agriculture Organization of the United Nations/World Health Organization [FAO/WHO], Evaluation of Health and Nutritional Properties of Powder Milk and Live Lactic Acid Bacteria; Report of a Joint FAO/WHO Expert Consultation, 2001.
5. Fermentation and biochemical engineering handbook;Vogel,1997