1. Large Retail Chains in Bulgaria Start Operating with Euros as Transition Continues Smoothly  Novinite.com
  2. Bulgaria adopts euro, nearly 20 years after joining EU  RTE.ie
  3. Another country starts using euros and retires its currency  The Independent
  4. Brussels is welcoming the EU’s next crisis with open arms  The Telegraph
  5. Bulgaria joins the euro after rocky path to new currency  BBC