A. P. Gobel, Y. Yandriani, and H. . Van Gobel, “COCONUT SHELL BIOBRIQUETTES TRAINING TO THE COMMUNITY OF KARANG KEMIRI, BELITANG, OGAN KOMERING ULU TIMUR REGENCY, SOUTH SUMATERA”, Spekta, vol. 2, no. 2, pp. 117–128, Dec. 2021.