1. zum Lusaka World Bank Upgrading Scheme D. Pasteur: The Management of Squatter Upgrading, Westmead 1979
2. C. Racodi/A. Schlyter: Upgrading in Lusaka: Participation and physical changes, Gävle 1981
3. M. Bamberger et al: Evaluation of Sites and Service Projects: Lusaka, Washington DC (World Bank) 1982
4. A. Schlyter: Upgrading Reconsidered: The George studies in retrospect, Gävle 1984
5. H. de Soto: The Other Path: The invisible revolution in the Third World, New York 1989