1. Coal and Petroleum Reactions in Coal/Oil Coprocessing, 1987 International Conference on Coal Science;Winschel,1987
2. Proceedings of the International Conference on Coal Science;Ohuchi,1989
3. Proceedings of the International Conference on Coal Science;Winschel,1989
4. Rolduc Symposia on Coal Science Coal Characterisation for Conversion Process;Steer,1986
5. Proceedings of the International Conference on Coal Science;Ohuchi,1989