1. The use of cash and transaction accounts by American families;Avery;Federal Reserve Bulletin,1986
2. Currency Use and Payments Patterns;Boeschoten,1992
3. The way we pay with money;Boeschoten;Journal of Business and Economics Statistics,1989
4. A systemic study of monetary systems;Caianiello;International Journal of General Systems,1982
5. Costa Storti, C., de Grauwe, P., 2002. Electronic money and the optimal size of monetary unions. CEPR Discussion Paper 3391.