BarnesH.NorthP., et al.1996: LETS on Low Income. London, The New Economics Foundation.
2.
CroallJ.1997: LETS Act Locally: The Growth of Local Exchange Trading Systems. London, Calouste Gulbenkian Foundation.
3.
DaunceyG.1989: Beyond the Crash: The Emerging Rainbow Economy. London, Greenprint.
4.
DouthwaiteR.1996: Short Circuit: Strengthening Local Economies for Security in an Uncertain World. Totnes, Devon, Green Books.
5.
NorthP.1996: LETS: a tool for empowerment in the inner city?Local Economy Vol. 11, No. 3, 284–293.
6.
SeyfangG.2002: Tackling social exclusion with community currencies: learning from LETS to Time Banks, International Journal of Community Currency Research, Vol. 6, url http://www.geog.le.-ac.uk/ijccr/vol4-6/6no3.htm, last accessed 23 January, 2003.