Sutarya, M. F., D. Rhakasywi, and F. Fahrudin. “Analysis of Biopellets from a Mixture of Coffee Grounds and Sawdust As an Alternative Energy Source: Analisis Biopelet Dari Campuran Ampas Kopi Dan Serbuk Gergaji Sebagai Sumber Energi Alternatif”. Academia Open, vol. 10, no. 2, Nov. 2025, p. 10.21070/acopen.10.2025.12889, doi:10.21070/acopen.10.2025.12889.