Sakib, K. N., S. N. Ahmed, A. Mubdee, and K. Kirtania. “Biochar Production from Waste Biomass Using Modular Pyrolyzer for Soil Amendment”. Chemical Engineering Research Bulletin, vol. 22, no. 1, June 2021, pp. 14-19, doi:10.3329/cerb.v22i1.54293.