1. How sustainable is the German energy system? Introducing the Indicator for Sustainable Development (ISD) as a new measuring concept. (18th February 2008) Authors: Schlor, Holger; Hake, Jurgen-Friedrich; Fischer, Wolfgang Journal: International journal of green economics Issue: Volume 2:Number 1(2008) Page Start: 1 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗