Albrecht, H.-J. (2003). The Informal Economy - A Summary and Perspectives. In J. Shapland, H.-J. Albrecht, J. Ditton, & T. Godefroy, The Informal Economy: Threat and Opportunity in the City (pp. 399–424) Criminological Research Reports from the Max Planck Institute for Foreign and International Criminal Law. Freiburg i. Br.: edition iuscrim.