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Digitales Geld und elektronischer Geldtransfer im Internet
Reus, Peter, (1998)
Security of online payment - a new industry standard
Brudenall, Peter, (2006)
Electronic safety and soundness : securing finance in a new age
Glaessner, Thomas, (2004)
A new untraceable of-line electronic cash system
Eslami, Ziba, (2011)