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The silent cover-up : America's underground economy
Lachman, M. Leanne, (1998)
Estimating the effects of informal economic activity : evidence from Los Angeles County
Marcelli, Enrico A., (1999)
Informalization : process and structure
Tabak, Faruk, (2000)
Evaluating competing theories of the shadow economy : some lessons from an English locality
Williams, Colin C., (2010)
Consumer services and economic development
Williams, Colin C., (1997)
The new barter economy : an appraisal of Local Exchange and Trading Systems (LETS)
Williams, Colin C., (1996)