O. Adolfsson et al., "Yogurt and gut function", American Journal of Clinical Nutrition80:2:245-256 (2004) [1]
books.google.com
The Natural History of Pliny, tr. John Bostock and H.T. Riley, London: Bell, 1856-93, Volume 3, p. 84: "It is a remarkable circumstance, that the barbarous nations which subsist on milk have been for so many ages either ignorant of the merits of cheese, or else have totally disregarded it; and yet they understand how to thicken milk and form there from an acrid kind of milk with a pleasant flavour".
Ripudaman S. Beniwal, et al., "A Randomized Trial of Yogurt for Prevention of Antibiotic-Associated Diarrhea", Digestive Diseases and Sciences48:10:2077-2082 (October, 2003) doi:10.1023/A:1026155328638
