(Reuters, DPA - 19/02/10; Standart, Dnevnik, Focus News Agency, The Banker -16/02/10; Bulgarian Energy Holding, National Electric Company, State Energy and Water Regulatory Commission)
(Rojters, DPA - 19/02/10; Standart, Dnevnik, novinska agencija Fokus, Bankar -16/02/10; Bugarski energetski holding, Nacionalna elektroenergetska kompanija, Državna regulatorna komisija za energetiku i vode)