1. 2018 Revision of World Urbanization Prospectshttps://www.un.org/development/desa/en/news/population/2018-revision-of-world-urbanization-prospects.html
2. World Urbanization Prospects: The 2018 Revision (ST/ESA/SER.A/420),2018
3. Urban Mobility and Transportation;Paganelli,2020
4. Statistics Brief, Urban Public Transport in the 21st Century,2017
5. Guidelines for Developing and Implementing a Sustainable Urban Mobility Plan,2019