Other partners, according to the media, include Greece's Hellenic Petroleum, US Cambridge Energy Research Associates, Russia's Lukoil and Rosneft, and Bulgaria's Technoexportstroy.
Potrivit presei, printre parteneri se numără compania greacă Hellenic Petroleum, compania americană Cambridge Energy Research Associates, firmele ruseşti Lukoil şi Rosneft şi compania bulgară Technoexportstroy.