Characterization of Nitrogen and Sulfur Compounds in Hydrocracking Feedstocks by Fourier Transform Ion Cyclotron Mass SpectrometryA. A. Al-Hajji, H. Muller and O. R. KoseogluOil & Gas Science and Technology - Rev. IFP, 63 1 (2008) 115-128DOI: https://doi.org/10.2516/ogst:2008001