Nilsson U., and Nyman M. “Carboxylic Acids in the Hindgut of Rats Fed Highly Soluble Inulin and Bifidobacterium Lactis (Bb-12), Lactobacillus Salivarius (UCC500) or Lactobacillus Rhamnosus (GG)”. Food & Nutrition Research, Mar. 2007, pp. 13-21, doi:10.3402/fnr.v51i1.1605.