@Article{dfr-2019,
  title = 	 {Geometry of Gross Substitutes Valuations},
  author = 	 {Sven de Vries and Ulf Friedrich and Stephen Raach},
  journal = 	 {Discrete Applied Mathematics},
  pages = {16--23},
  year = 	 {2019},
  volume = {272},
  url = {https://doi.org/10.1016/j.dam.2018.11.003}
  }