1. Amacher, G.S., Koskela, E., Ollikainen, M. (2004). Environmental quality competition and eco-labeling. J. Environ. Econ. Manag., 47, 284–306.
2. Carus, M., Eder, A. (2015). Bioverbundwerkstoffe Naturfaserverstärkte Kunststoffe (NFK) und Holz- Polymer-Werkstoffe (WPC), Fachagentur Nachwachsende Rohstoffe.
3. Carus, M., Partanen, A. (2018). Natural fibre-reinforced plastics: establishment and growth in niche markets. nova-Institut GmbH (Eds.), Hürth.
4. Daly, H.E. (1991). Elements of environmental macroeconomics. In: Costanza, R. (Eds.). Ecological Economics: the Science and Management of Sustainability. Columbia University Press, New York.
5. Feucht, Y., Zander, K. (2018). Consumers’ preferences for carbon labels and the underlying reasoning. A mixed methods approach in 6 European countries. J. Clean. Prod., 740–748.