Baldrich Ferrer, Carlos A., and Luz Ángela Novoa Mantilla. “Detailed Chemical Characterization of Petroleum Middle Fractions by Chemometrics Analysis of Their Ultraviolet Spectrum”. CT&F - Ciencia, Tecnología Y Futuro, vol. 3, no. 3, Dec. 2007, pp. 173-90, doi:10.29047/01225383.485.