References
- The City of Sofia ( 1997 ) UNDP , Sofia .
- Genov , Nikolai (1999) Managing Transformations in Eastern Europe . UNESCO/MOST and REGLO, Paris and Sofia .
- Musil , Jiří (2004) ‘Fifty years of urban sociology’ , in Advances in Sociological Knowledge over Half a Century , ed. Nikolai G.enov , pp. 269 – 298 . Verlag für Sozialwissenschaften , Wiesbaden .
- Obštestveni precenki za sastoyanieto i perspektivite na grad Sofia / Public Assessments of the Present State and the Prospects of the City of Sofia (1999) REGLO, Sofia. Report from a public opinion poll carried by a team headed by N. Genov .
- Statističeski spravočnik (Statistical Handbook) (2005) Nacionalen statističeski institute , Sofia .
- Sofia 120 godini stolica / Sofia 120 Years Capital City (2000) Bulgarian Academy of Sciences , Sofia .
- Sofia in Figures (2004) National Statistical Institute , Sofia .