A. Z. M. SALEM, H. AMMAR, A. E. KHOLIF, M. M. Y. ELGHANDOUR, and L. B. ORTIZ, “Effect of glucoamylase enzyme extract on in vitro gas production and degradability of two diets with 25% of corn or sorghum grains”, Indian J of Anim Sci, vol. 85, no. 2, pp. 183–188, Feb. 2015, doi: 10.56093/ijans.v85i2.46613.