1. Metchnikoff E. Lactic acid as inhibiting intestinal putrefaction. In:The Prolongation of Life Optimistic Studies.Heinemman W (Ed.). London, UK 161–183 (1907).
2. Probiotics: Growth-Promoting Factors Produced by Microorganisms
3. Probiotics in man and animals
4. Probiotics
5. Joint FAO/WHO Expert Consultation. Health and Nutritional properties of probiotics in food including powder milk with live lactic acid bacteria. Joint FAO/WHO Expert Consultation, Cordoba, Argentina, 1–4 October 2001.