F. Purwanto, S. Soesanto, S. Rahayu, Z. A. Fitriyani, and D. G. P. Putra, “Circular economy approach: A sustainable business model in transforming farmers’ livelihoods”, J. Econ. Res. Policy Stud., vol. 6, no. 2, pp. 389–409, Jul. 2026.