@article{GudipudiLuedekeRybskietal.2018,
  author    = {Ramana Venkata Gudipudi and Matthias K. B. L{\"u}deke and Diego Rybski and J{\"u}rgen Kropp},
  title     = {Benchmarking urban eco-efficiency and urbanites' perception},
  journal   = {Cities},
  volume    = {74},
  pages     = {109 -- 118},
  doi       = {10.1016/j.cities.2017.11.009},
  year      = {2018},
}