MISHRA, A S, et al. “Rumen Fermentation Characteristics, Ciliate Protozoa and Utilization of Nutrients in Sheep Fed Sodium Hydroxide Treated Mustard Straw”. The Indian Journal of Animal Sciences, vol. 70, no. 8, Jan. 2014, https://epubs.icar.org.in/index.php/IJAnS/article/view/36207.