@article{CTT100790347,
  author = {Ferran  Hurtado and Matias  Korman and Marc  van Kreveld and Maarten Löffler and Vera  Sacristán and Akiyoshi Shioura and Rodrigo Silveira and Bettina  Speckmann and Takeshi Tokuyama},
  title = {Colored Spanning Graphs for Set Visualization},
  journal = {Computational geometry},
  year = 2018,
}

@article{CTT100790333,
  author = {Shun Fukuda and Akiyoshi Shioura and Takeshi Tokuyama},
  title = {Buyback problem with discrete concave valuation functions},
  journal = {Discrete Optimization},
  year = 2017,
}