Pahwa, A., and B. N. . Mathur. “Influence of Oral Ingestion of Bifidobacteria on the Intestinal Microflora and Mineral Absorption Among Rats”. The Indian Journal of Nutrition and Dietetics, vol. 19, no. 9, Sept. 1982, pp. 267-72, http://www.informaticsjournals.com/index.php/ijnd/article/view/12859.