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Entstehung und Beharrungstendenz des "Informellen Sektors" : eine kritische Analyse bisheriger Erklärungsansätze aus institutionenökonomischer Sicht
Markmann, Monika, (2001)
The Informal Sector, Third Version
de Paula, Aureo, (2010)
The informal sector and the environment
Swain, Ranjula Bali, (2023)
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)