Shia, Wei-Yau, Po-Chen Chu, Chih-Chung Chou, and Wei-Ming Lee. 2013. “Investigation of the Relationship between Endometrial MMP Activities and Sex Hormones in Mature Bitches”. The Thai Journal of Veterinary Medicine 41 (3):289-98. https://he01.tci-thaijo.org/index.php/tjvm/article/view/9554.