Giyanto, Thohirudin, and M. Nasrun, “SYNTHESIS OF GRAPHENE NANOSHEETS FROM COCONUT SHELLS AT A ROASTING TEMPERATURE OF 220°C AND A PYROLYSIS TEMPERATURE OF 500°C USING SEM-EDX OBSERVATIONS AND PERFORMANCE TESTS”, BESTI, vol. 4, no. 3, pp. 1965–1977, Sep. 2026.