Yuni K, Kusnul Ciptanila, et al. “Closed-Loop Sytem in Sarangan Magetan Dairy Farm: Designing a Business Model Canvas for Resource Optimization”. Eqien - Jurnal Ekonomi Dan Bisnis, vol. 14, no. 2, June 2025, pp. 468-81, doi:10.34308/eqien.v14i2.1996.