Natural Gas News Novinite: South Stream Co Seeks to Assuage Eco Concerns in Bulgaria Feb 6, 2013 8:18:am
Natural Gas News RIA Novosti: US to Share with Ukraine Shale Gas Production Technologies Feb 6, 2013 7:19:am
Natural Gas News Voice of Russia: Bulgaria wants safe technology to explore shale gas reserves Feb 6, 2013 7:06:am
Natural Gas News Reuters: Polish firms miss deadline but continue talks on shale gas deal Feb 5, 2013 7:29:pm
