Rizkiana, J., S. Handoko, W. Wulandari, M. A. Ridha, H. A. Prasetyo, and D. Sasongko. “Hybrid Coal: Effects Of Composition And Co-Pyrolysis Retention Time in Low Rank Coal and Biomass Waste Co-Pyrolysis Process on The Product’s Yield”. ASEAN Journal of Chemical Engineering, Vol. 18, no. 1, June 2018, pp. 68-75, https://dev.journal.ugm.ac.id/v3/AJChE/article/view/9016.