santosa, kresna mulya, H. Firmanto, and I. Mufandi. “The Potential of Coffee and Cocoa Shell Waste As An Energy Source: Analysis of Characteristics of Briquettes From Coffee and Cocoa Shell Waste Through The Carbonization Process”. Agroindustrial Technology Journal, vol. 7, no. 3, May 2024, pp. 88-103, doi:10.21111/atj.v7i3.11245.