9Satoru Sugita, Deguchi Tetsuya, Shigehisa Takou. UBC (Upgrading .Brown Coal) Process Development [J]. Kobe Steel Engineering Reports, 2003, 53: 42.
10Kinoshita, Shigeru, Yamamoto, et al. Demonstration of upgraded brown coal (UBC) process by 600 t/d plant [R]. Research and Development Kobe Steel Engineering Reports, 2010.