Chen, Y.C., et al. “The Influence of a Dietary Beta-Fructan Supplement on Digestive Functions, Serum Glucose, and Yolk Lipid Content of Laying Hens”. International Journal of Poultry Science, vol. 4, no. 9, Aug. 2005, pp. 645–651, https://doi.org/10.3923/ijps.2005.645.651.