J. C. Poveda Jaramillo, D. R. Molina Velasco, N. A. Bohorquez Toledo, M. H. Torres, and E. Ariza León, “Chemical characterization of the asphaltenes from Colombian colorado light crude oil”, CT&F Cienc. Tecnol. Futuro, vol. 6, no. 3, pp. 105–122, Jun. 2016.