1. Alexander’s Oil and Gas Connections. (2004). New gas pipeline linking Libya and Italy opened. Alexander’s Oil and Gas Connections. 8 October 2004.
2. Algeria Ministry of Energy and Mining. (2009). Project GALSI website. http://www.mem-algeria.org/actu/comn/galsi.htm . Accessed December 22, 2009.
3. Attanasi, E. D., & Freeman, P. A. (2011). Survey of stranded gas and delivered costs to Europe of selected resources. SPE Economics and Management, 3(3), 149–162.
4. Barents Observer. (2010). Nord Stream more expensive. BarentsObserver.com website. 17 March 2019. http://www.barentsobserver.com/nord-stream-more-expensive.4760460-116321.html .
5. BP. (2011a). BP Statistical Review of World Energy 2011. London: BP. http://www.bp.com/sectionbodycopy.do?categoryId=7500&contentId=7068481 . Accessed June 16, 2011.