Guo, R., Y. Gu, and L. Li. “The development history of Germfree animal model and its application in the study of microbiota-related diseases”. The Thai Journal of Veterinary Medicine, vol. 53, no. 1, Mar. 2023, pp. 1-13, https://he01.tci-thaijo.org/index.php/tjvm/article/view/262173.