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2. ECB (2017). Press release. Payments statistics for 2016. Frankfurt am Main: European Central Bank.
3. European Commission (2015). Survey on merchants’ costs of processing cash and card payments. Luxembourg: Publications Office of the European Union.
4. G4S (2016). Cash report 2016: Europe. Utrecht: G4S Cash Solutions.
5. Hayashi F. (2010). Public authority involvement in credit and debit card markets: Various countries. Kansas City, MO: Federal Reserve Bank of Kansas City.