@article{Heistermann2017,
  author    = {Maik Heistermann},
  title     = {HESS Opinions: A planetary boundary on freshwater use is misleading},
  journal   = {Hydrology and earth system sciences},
  volume    = {21},
  pages     = {3455 -- 3461},
  doi       = {10.5194/hess-21-3455-2017},
  year      = {2017},
}