Kihedu, J. H., R. Yoshiie, Y. Nunome, Y. Ueki, and I. Naruse. “Contribution of Volatile Interactions During Co-Gasification of Biomass With Coal”. Journal of Technology Innovations in Renewable Energy, vol. 2, no. 1, Feb. 2013, pp. 39-46, doi:10.6000/1929-6002.2013.02.01.5.