1. Adegoke , S.O. , et al. 1976 . Tar Sands Project - Phase II, Estimation of Reserves, Materials Testing and Chemical Analysis. Unpublished proprietary report, Geological Consultancy Unit , University of Ife , Nigeria .
2. Production of aromatic hydrocarbons by the hydrogenative purification of liquid pyrolysis products
3. Hyndman , A.W. 1972 . Athabascan Bitumen, High Conversion to Synthetic Crude. 22nd CSChe Conference, Toronto , Ontario , Canada .
4. Hydrocracking of bitumen and heavy oils at CANMET