Thongruang, S., Paengkoum, P., Suksombat, W., and Bureenok, S. “Effects of tropical forage species on Butyrivibrio fibrisolvens, Fibrobacter succinogenes and total bacteria population in goat rumen using real-time PCR techniques”. International Journal of Agricultural Technology, vol. 14, no. 7, Dec. 2018, pp. 2125-36, https://li04.tci-thaijo.org/index.php/IJAT/article/view/10327.