@techreport{emf2015circularity,
  title = {Circularity Indicators - An Approach to Measuring Circularity, Methodology}
  author = {EMF; Granta Design; LIFE},
  url = {https://www.ellenmacarthurfoundation.org/assets/downloads/insight/Circularity-Indicators_Methodology_May2015.pdf},
  year = {2015}
}