@inbook{van2012cities,
  title = {Cities as Organisms}
  author = {van den Dobbelsteen, Andy; Keeffe, Greg; Tillie, Nico; Roggema, Rob},
  publisher = {Factor X: Challenges, Implementation Strategies and Examples for a Sustainable Use of Natural Resources},
  url = {https://doi.org/10.1007/978-94-007-4378-6_9},
  year = {2012}
}