World Commission on Environment and Development. Our Common Future. Report of the World Commission on Environment and Development. 1987. [Online] Available from: http://www.un-documents.net/wced-ocf.htm [Accessed 20th August 2019].
United Nations. The Sustainable Development Goals. 2019. [Online] Available from: https://www.un.org/sustainabledevelopment/sustainable-development-goals/ [Accessed 20th August 2019].
The Natural Step. 2019. [Online] Available from: https://thenaturalstep.org/ [Accessed 20th August 2019].
The Natural Step. Approach. 2019. [Online] Available from: https://thenaturalstep.org/approach/ [Accessed 20th August 2019].
The Natural Step. Assessing the sustainability of products and services: Bring strategic sustainability into your product design and innovation. 2019. [Online] Available from: https://thenaturalstep.org/slca/ [Accessed 20th August 2019].
The Natural Step. Strategic Life Cycle Assessment (SLCA). 2019. [Online] Available from: https://thenaturalstep.org/wp-content/uploads/2018/01/SLCA-matrix-structure.pdf [Accessed 20th August 2019].
The Natural Step. Life = Chemistry. Sustainable management of chemicals is an essential part of the transition to a sustainable world. 2019. [Online] Available from: https://thenaturalstep.org/chemicals/ [Accessed 20th August 2019].