1. European Commission 2018a: Circular economy strategy—environment—European Commission.
http://ec.europa.eu/environment/circular-economy/index_en.htm
(2018). Accessed 11 Apr 2018
2. European Commission 2018b: Directive 2008/98/EC of the European Parliament and of the Council of 19 November 2008 on waste and repealing certain directives.
https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32008L0098
(2018). Accessed 11 Apr 2018
3. Sokka, L., Pakarinen, S., Melanen, M.: Industrial symbiosis contributing to more sustainable energy use—an example from the forest industry in Kymenlaakso, Finland. J. Cleaner Prod. 19, 285–293 (2011).
https://doi.org/10.1016/j.jclepro.2009.08.014
4. European Union’s Wastewater Framework Directive 2000/60/EC.
https://www.eea.europa.eu/data-and-maps/indicators/urban-waste-water-treatment/urban-waste-water-treatment-assessment-4
(2000). Accessed 2 Apr 2019
5. The Council Directive 91/271/EEC.
http://ec.europa.eu/environment/water/water-urbanwaste/index_en.html
(1991). Accessed 2 Apr 2019