(The Sofia Echo - 06/05/11; Mediafax, FOCUS News Agency - 05/05/11; Swissinfo, Nine O'clock, Mediafax, Dnevnik.bg, FOCUS News Agency - 04/05/11; EurActiv - 03/05/11; Mediapool - 30/04/11; European Commission; Website of the Swiss Federal Department of Justice and Police)
(The Sofia Echo - 06/05/11; Mediafax, FOCUS Haber Ajansı- 05/05/11; Swissinfo, Nine O'clock, Mediafax, Dnevnik.bg, FOCUS Haber Ajansı - 04/05/11; EurActiv - 03/05/11; Mediapool - 30/04/11; Avrupa Komisyonu; İsviçre Federal Adalet ve Polis Bakanlığı İnternet Sitesi)