1. Highlighting heavy oil;Alboudwarej;Oilfield Rev,2006
2. Alberta’s oil sands: hard evidence, missing data, new promises;Weinhold;Environ Health Perspect,2011
3. Oil Shale/Tar Sands Guide. [accessed 20.03.13].
4. Kahya D, Anderson R. Oil sands battle between Canada and EU [accessed 02.03.13].
5. Lewis B. Climate commissioner hails victory against lobbyists. [accessed 01.04.13].