Analyzing Used Cooking Oil Flow in Yogyakarta City: Advancing Circular Economy through Reverse Logistics ManagementSiti Mahsanah Budijati, Fatma Hermining Astuti, Wandhansari Sekar Jatiningrum and Rafih MuallifE3S Web Conf., 622 (2025) 01021DOI: https://doi.org/10.1051/e3sconf/202562201021