@misc{carolin2022porto,
  title = {Porto - Urban Circularity Assessment sheet, all data for 2009 analysis}
  author = {Carolin Bellstedt, Gerardo Ezequiel Martín Carreño, Deniz Çelik, Tiffany Nicoli, Aristide Athanassiadis},
  url = {https://docs.google.com/spreadsheets/d/1LBMT104FOnV3XvbLXTO88KmHSX_UJYJvZdM7uJl1qZA/edit?usp=sharing},
  year = {2022}
}