@article{threeobjectiveintegralr2subsetselectionn,
  title = {Three-Objective Integral R2 Subset Selection: NP-Hardness and Submodular Approximation},
  author = {Michael T. M. Emmerich},
  year = {2026},
  eprint = {2606.26591},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.26591},
}