Na, Hyemin, Yeseong Lee, Sang-Kwon Lee, Hojung Choi, Youngwon Lee, and Kija Lee. “The breed-specific vertebral heart score and vertebral left atrial size in toy breed dogs”. The Thai Journal of Veterinary Medicine 52, no. 4 (January 9, 2023): 753–759. accessed September 15, 2026. https://he01.tci-thaijo.org/index.php/tjvm/article/view/261504.