@article{JMLR:v22:20-1019,
  author  = {Joon Kwon},
  title   = {Refined approachability algorithms and application to regret minimization with global costs},
  journal = {Journal of Machine Learning Research},
  year    = {2021},
  volume  = {22},
  number  = {200},
  pages   = {1--38},
  url     = {http://jmlr.org/papers/v22/20-1019.html}
}