Chumpawadee, Songsak, et al. “Nutritional Evaluation of Non Forage High Fibrous Tropical Feeds for Ruminant Using in Vitro Gas Production Technique”. Pakistan Journal of Nutrition, vol. 4, no. 5, Aug. 2005, pp. 298-03, https://doi.org/10.3923/pjn.2005.298.303.