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Graphic Representation of the 13C Chemical Shifts and Substructures of Hydrocarbons and Oxygen-Containing Compounds for the Analysis of Chemical Structures of Coals and the Related Materials
K. Hayamizu, M. Yanagisawa, A. Yabe, Y. Sugimoto, and O. Yamamoto
[J. Jpn. Inst. Energy, Vol.73, pp.267-278, 1994]