(The Sofia Echo, Πρακτορείο Ειδήσεων Σόφιας, Dnevnik.bg, Mediapool -- 22/04/10 - 23/04/10, BTA - 21/04/10, Eurobarometer)
(The Sofia Echo, Sofia News Agency, Dnevnik.bg, Mediapool -- 22/04/10 - 23/04/10; BTA - 21/04/10; Eurobarometer)