Optimization of Calorific Value in Briquette made of Coconut Shell and Cassava Peel by varying of Mass Fraction and Drying TemperatureSabarudin Ahmad, Kukuh Winarso, Rifky Yusron and Samsul AmarE3S Web Conf., 499 (2024) 01009DOI: https://doi.org/10.1051/e3sconf/202449901009