1. Kamide, M.; Maruyama, T.The Development of Biocoal Briquette Fabricating Process for Using Low Grade Coal and Biomass (II); Research Report of Hokkaido Industrial Research Institute, Sapporo, Japan, pp 1−50, 1989.
2. Xie Y. S.The First International Symposium on Environmental Protection in The Asian Region; Research Report of Japan Society of the Promotion of Science Research of the Future Program, Japan, pp 1−8, 1999.