1. Alfeld, E.L. (N.d.). System Dynamics. Encyclopedia.
2. Fabien Girardin, Andrea Vaccari, Alexandre Gerber, Assaf Biderman, Carlo Ratti. (2009). Quantifying urban attractiveness from the distribution and density of digital footprints. International Journal of Spatial Data Infrastructures Research Vol.4, 175-200.
3. Fabien Girardin, Andrea Vaccari, Alexandre Gerber, Assaf Biderman, Carlo Ratti. . (2009). Quantifying urban attractiveness from the distribution and density of digital footprints. International Journal of Spatial Data Infrastructures Research Vol.4, 175-200.
4. GEO. (2014, January 28). demographicpartitions.org. Retrieved from demographicpartitions.org: http://demographicpartitions.org/urbanization-2013/.
5. Spatial interaction between urban areas and cause-specific mortality differentials in France;Ghosn;Health & Place,2013