1. Energy Resources Conservation Board 2012
2. National Energy Board Canada's Oil Sands: Opportunities and Challenges to 2015: An Update,” National Energy Board, Calgary, AB 2006
3. G. R. Coulson Process for Separation Oil From Bitumenous Sands, Shales, Etc.,” US Patent No. 2,825,677 1958
4. T. S. Leary J. H. Cottrell Recovery of Bitumen From Bitumenous Sand,” US Patent No. 3,117,922 1964
5. A. M. Benson Filtration of Solvent-Water Extracted Tar Sand,” US Patent No. 3,459,653 1969