James R, Arthur M., Wenqiao Yuan, Michael D. Boyette, Donghai Wang, and Ajay Kumar. 2014. “In-Chamber Thermocatalytic Tar Cracking and Syngas Reforming Using Char-Supported NiO Catalyst in an Updraft Biomass Gasifier”. International Journal of Agricultural and Biological Engineering 7 (6):91-97. https://www.ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/1648.