2 A. Demirgüç-Kunt, L. Klapper, D. Singer, S. Ansar, and J. Hess.The Global Findex database 2017:Measuring financial inclusion and the fintech revolution.
World Bank Group, 2018.访问日期:2019 年 5 月 15 日。Globalfindex.worldbank.org. [Online].网址:https://globalfindex.worldbank.org/sites/globalfindex/
files/2018-04/2017%20Findex%20full%20report_0.pdf
3 OECD.Mobile phones:Pricing structures and trends.Paris, France:OECD Publishing, 2000, p. 67. [Online].网址:https://books.google.com/books?id=pcP84M_GBeo
5 A. Demirgüç-Kunt, L. Klapper, D. Singer, S. Ansar, and J. Hess.The Global Findex database 2017:Measuring financial inclusion and the fintech revolution.
World Bank Group, 2018.访问日期:2019 年 5 月 15 日。Globalfindex.worldbank.org. [Online].网址:https://globalfindex.worldbank.org/sites/globalfindex/files/2018-04/2017%20Findex%20full%20report_0.pdf__