PREYGER, David, and Vladimir OMELCHENKO. “CASPIAN DILEMMA: HOW TO DELIVER BLUE FUEL TO THE EUROPEAN MARKET”. CENTRAL ASIA AND THE CAUCASUS 6, no. 3 (June 30, 2005): 120–128. Accessed May 3, 2025. https://www.ca-c.org/CAC/index.php/cac/article/view/782.