1. Van Eetvelde , G. Timmerman , J. Vansteenbrugge , J. Van Ackere , S. 2013 Industrial Symbiosis
2. Van Eetvelde , G. et al 2016 https://www.spire2030.eu/epos
3. EU2020 strategy 2016 http://ec.europa.eu/europe2020
4. DG Enterprise & Industry 2011 Roadmap to a Resource Efficient Europe (COM(2011) 571) http://ec.europa.eu/environment/resource_efficiency/about/roadmap