1. Grasland, C., et al. (2008) Shrinking Regions: A Paradigm Shift in Demography and Territorial Development.
2. Study for Directorate-General for Internal Policies of the Union, Policy Department B: Structural and Cohesion Policy, European Parliament. Brussels: European Parliament.
3. United Nations, (2016) The World’s Cities in 2016 – Data Booklet (ST/ESA/ SER.A/392).
4. EEA (2015) European environment — state and outlook 2015: Assessment of global megatrends, European Environment Agency, Copenhagen.
5. Oswalt, P. (2005) Shrinking Cities volume 1 – international reseach. 1st ed. Ostfildern-Ruit: Hatje Cantz Verlag, p.12.