1. P.J. Rhedey and D. DuTremblay, “Refinery Feedstocks, Coke Structures and Aluminum Cell Anodes,” Light Metals 1977, AIME, New York, N.Y., Vol. 1, pp. 301–316.
2. ASTM Method D-287-67, API Gravity of Crude Petroleum and Petroleum Products (Hydrometer Method), 1977.
3. ASTM Method D-3279-81, Asphaltenes as n-Heptane Insolubles.
4. ASTM Method D-1218-61, Refractive Index and Refractive Dispersion of Hydrocarbon Liquids, 1977.
5. L.T. Eby, “Properties of High Boiling Petroleum Products, High Aromatics Characterization by Chromatography,” Analytical Chemistry, 25,(7) (1953), pp. 1057–1060.