@article{frenken2017putting,
  title = {Putting the sharing economy into perspective}
  author = {Frenken, Koen and Schor, Juliet},
  journal = {Environmental Innovation and Societal Transitions},
  url = {http://www.sciencedirect.com/science/article/pii/S2210422417300114},
  year = {2017}
}