Winyuchonharoen, W., S. Techangamsuwan, and S. D. Surachetpong. “Detection of transforming growth factor beta 1 in normal dogs and dogs with degenerative mitral valve disease”. The Thai Journal of Veterinary Medicine, vol. 48, no. 2, Aug. 2018, pp. 289-94, https://he01.tci-thaijo.org/index.php/tjvm/article/view/137882.