7Berentsen, A. Monetary Policy Implications of Digital Money. 1998, Kyktos [J]. Vol 51, No 1, 89-117.
8Berk, J. M. Central banking and financial innovation. A survey of the modern literature. 2002, Banca Nazionale Quarterly Review [J]. No. 222, September, 263-297.
9BIS. Implications for Central Banks of the Development of Electronic Money [R], Basle, 1996, PP33. http: //www. eldis. org/static/DOC2027. htm.
10BIS. Survey of developments in electronic money and internet and mobile payments[R]. 2004, www. his. org/publ/cpss62. pdf.
