15. Cheng, C. N.; Lai, J. H.; Huang, M. Z.; Oung, J. N.; Shiea, J. “Rapidly Differentiating Crude Oils of Different Origins by Electrospray-Assisted Pyrolysis Ionization Mass Spectrometry and Principle Component Analysis” 2012, 60th ASMS Conference on Mass Spectrometry, Vancouver, Canada