1Given P H. The distribution of hydrogen in coals and its relation to coal structure J [J]. Fuel, 1960, 39 (2): 147-153.
2Shinn J H. From coal to single-stage and two-stage products: a reactive model of coal structure[J]. Fuel, 1984, 63 (9) : 1187- 1196.
3Huttinger K J, Michenfelder A W. Molecular structure of a brown coal [J]. Fuel, 1987, 66 (8): 1164-1165.
4Munteen L V, Stock L M. Solid state carbon-13 NMR spectroscopy of Pocahontas No. 3 coal [J]. Energy Fuels, 1991, 5 (6) : 767 -769.
5Nomura M, Artok L, Murata S, et al. Structural evaluation of Zao Zhuang coal [J] . Energy Fuels, 1998, 12 (5): 512-523.
6Hatcher P G, Faulon J L, Wenzel K A, et al. A structural model for lignin-derived vitrinite fromhigh-volatile bituminous coal (coalified wood) [J].Energy Fuels, 1992, 6 (8): 813-820.