Thu, Do Van, Doan Viet Binh, Tran Xuan Khoi, and Le Thi Hue. “Research Bac Ha Dog Semen Frozen in Liquid Nitrogen -196oC”. Academia Journal of Biology 39, no. 2 (July 19, 2017): 236–244. Accessed November 22, 2024. https://vjs.ac.vn/index.php/vjbio/article/view/8867.