1. Mochida, I., Motoshima, N. and Korai, Y. Fuel submitted for publication
2. Mochida, I., Motoshima, N., Korai, Y. and Nakagawara, H. Fuel submitted for publication
3. Mochida, I., Nakagawara, H. and Korai, Y. Fuel submitted for publication
4. Characterization of the extract and residual coal from the extraction with carbon disulfide-pyridine mixture at room temperature.