Mahboobi, Zahra, et al. “Estimation of Microbial Protein Synthesis in the Rumen of Growing Lambs Based on the Purine Derivative Excretions and the Dietary Forage-to-Concentrate Ratio”. Journal of Advanced Veterinary and Animal Research, vol. 10, no. 3, Sept. 2023, pp. 385-94, https://banglajol.info/index.php/JAVAR/article/view/80479.