S. K. SANKHYAN, R. BHATTA, and S. A. KARIM, “Relative efficiency of digestibility assessment in sheep by conventional and double indicator method”, Indian J of Anim Sci, vol. 67, no. 7, Nov. 2013, Accessed: Oct. 24, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAnS/article/view/34861