"The Macroeconomics of De-Cashing" by the IMF - Link below:
http://www.imf.org/~/media/Files/Publications/WP/2017/wp1771.ashx%20
or read "IMF Anti Cash Guidelines" by Norbert Haering - Link below:
http://norberthaering.de/en/home/32-english/news/808-imf-anti-cash-guidelines
meep