Anh, Le, and Nguyen Canh. “Economic Efficiencyof Slow Release Fertilizer Applicationin Sedge Production in Nga SonDistrict, Thanh HoaProvince”. Vietnam Journal of Agricultural Sciences, vol. 13, no. 5, May 2024, p. 223, http://testtapchi.vnua.edu.vn/index.php/vjasvn/article/view/223.