E. Y. Yessa, L. I. T. A. Tumbelaka, I. Wientarsih, M. F. Ulum, B. Purwantara, and Amrozi, “In Vitro, In Compost, and In Vivo Assessment of Chitosan-Polyethylene Glycol as an Intravaginal Insert for Progesterone Delivery in Sheep”, Trop. Anim. Sci. J., vol. 46, no. 3, pp. 295–305, Aug. 2023, doi: 10.5398/tasj.2023.46.3.295.