Walz, U., Jaeger, J. (2016): Fracking is a significant driver of landscape fragmentation - Folgen von Fracking: Ein neuer Schub der Landschaftsfragmentierung ist zu erwarten. GAIA: Ecological Perspectives for Science and Society 25(2): 99-104.
 
BMI (Bundesminister des Innern) (Hrsg.). 1985. Bodenschutzkonzeption der Bundesregierung. Bundestags-Drucksache 10/2977. Stuttgart: BMI. 

EEA (European Environment Agency), FOEN (Swiss Federal Office for the Environment). 2016. Urban sprawl in Europe. Joint EEA-FOEN report. EEA Report 11/2016. Luxembourg: Publications Office of the European Union. www.eea.europa.eu/publications/ urban-sprawl-in-europe. 

Schneidewind, U., Augenstein, K. (2016): Three Schools of Transformation Thinking. The Impact of Ideas, Institutions, and Technological Innovation on Transformation Processes. GAIA: Ecological Perspectives for Science and Society 25(2): 88-93.