Result of determination placental protein 13 (pp13) and placental growth factor in placental extract of mongolian mares. Mong. J. Agric. Sci. [Internet]. 2018 Dec. 28 [cited 2026 Jun. 26];25(03):57-65. Available from: https://www.mongoliajol.info/index.php/MJAS/article/view/1172