5Berman Dennis K. and Paul Glader. Rio Tinto nears deal to acquire Alcan of Canada; bid of about $37 billion would thwart Alcoa [J], Wall Street Journal, Eastern edition, 2007(7)12: A. 1.
6Ma Xin and Philip Andrews-Speed. The overseas activities of China's national oil companies: rationale and outlook [J]. Minerals and Energy: Raw Materials Report, 2006,21(1): 17 - 30.
7Otto, James M. The competitive position of countries seeking exploration and development investment [J]. Society of Economic Geologists, Special Publication 12,New York,2006
8UNCTAD (2005, 2006, 2007). World Investment Report.