(Finfacts, Πρακτορείο ειδήσεων Σόφιας - 20/05/10, Bloomberg, Reuters, AFP, ANA-MPA, Dnevnik.bg, International Institute for Management Development - 19/05/10)
(Finfacts, Sofia Haber Ajansı - 20/05/10; Bloomberg, Reuters, AFP, ANA-MPA, Dnevnik.bg, Uluslararası İş Geliştirme Enstitüsü - 19/05/10)