Principal Regularities in Compositions and Structures of High-Molecular Compounds from Crude Oils and Natural BitumensA. Golovko, Yu. Golovko, L. Gorbunova, V. Kamyanov, G. Pevneva and T. FilimonovaOil & Gas Science and Technology - Rev. IFP, 63 1 (2008) 95-114DOI: https://doi.org/10.2516/ogst:2007082