(Finfacts, Sofia News Agency - 20/05/10; Bloomberg, Reuters, AFP, ANA-MPA, Dnevnik.bg, International Institute for Management Development - 19/05/10)
(Finfacts, Sofijska tiskovna agencija - 20/05/10; Bloomberg, Reuters, AFP, ANA-MPA, Dnevnik.bg, Međunarodni instititut za razvitak managementa - 19/05/10)