(BTA, Sega, Standart, Europe.bg, Oil & Gas Eurasia - 01/12/10; Reuters, BTA, Sofijska tiskovna agencija, Dnevnik.bg, Mediapool, The Banker, Publics.bg, ANSA, Xinhua, službena internetska stranica Vlade Bugarske - 30/11/10)
(BTA, Sega, Standart, Europe.bg, Oil & Gas Eurasia - 01/12/10; Reuters, BTA, Sofia News Agency, Dnevnik.bg, Mediapool, The Banker, Publics.bg, ANSA, Xinhua, Official Website of the Government of Bulgaria - 30/11/10)