Tinda Afriani, Ferdinal Rahim, Mangku Mundana, Arif Rahmat, Jaswandi, and Anna Farhana, “The Effect of GnRH on Reproductive Performance and Progesterone Hormone Levels in Buffalo in West Sumatera : Reproductive Performance and Progesterone Hormone Levels ”, JT, vol. 11, no. 2, pp. 1–8, Dec. 2020.