1. C.W. Bowman, Proceedings 7th World Petroleum Congress, vol. 3, 1967, pp. 583–604.
2. C.P. Outrim, R.G. Evans, in: D.A. Redford, A.G. Winestock (Eds.), The Oil Sands of Canada–Venezuela, CIM Special Issue, vol. 17, Canada, 1977.
3. Hot water process development for Utah tar sands
4. C.W. Bowman, Canadian Institute of Mining and Metallurgy, Calgary, 1967, pp. 1–8.