 Nations Population DivisionUrbanization in BulgariaNASA Night Satellite Imagery – City lights can provide a simple, visual measure of urbanizationGeopolis: research group, University of Paris-Diderot, FranceThe Natural History of Urbanization, by Lewis MumfordThe World System urbanization dynamics, by Andrey KorotayevBrief review of world socio-demographic trends includes a review of global urbanization trendsWorld Economic and Social Survey 2013, United Nations Department of Economic and Social Affairs.vteනගරUrban geographyUrban areaCity centreDowntownSuburbExurbCore cityTwin citiesSatellite cityEdge cityCommuter townCity properlimitsConurbationMetropolitan areaMetropolisMegacityMegalopolisCities with the most skyscrapersUrbanizationSuburbanizationShrinking citiesGhost townAbandoned villageLost cityTent cityClosed cityCollege townUrban governmentCity statusMunicipalitydirect-controlledIndependent cityCity-stateAutonomous cityCapital cityUrb