1. Coal log pipeline technology: an overview;Liu;Powder Technology,1997
2. H. Liu, J. Noble, R. Zuniga, J.P. Wu, Economic Analysis of Coal Log Pipeline Transportation of Coal, CPRC Report No. 95-1, Capsule Pipeline Research Center, University of Missouri, Columbia, MO, 1995.
3. B.W. Gunnink, S. Yang, Rapid compaction of coal logs for coal log pipelines, Proceedings of the 22nd International Technical Conference on Coal Utilization and Fuel Systems, 1997, pp. 95–106.
4. B.W. Gunnink, W. Li, Progress in rapid compaction of coal logs for freight pipelines, Proceedings of the 23rd International Technical Conference on Coal Utilization and Fuel Systems, 1998, pp. 901–910.
5. D.C. Jones, Rhys, Briquetting, in: H.H. Lowry (Ed.), Chemistry of Coal Utilization: Supplemental Volume, Chap. 16, Wiley, New York, 1963, pp. 675–753.