@article{characterizinginstancehardnessin,
  title = {Characterizing instance hardness in classification and regression problems},
  author = {Gustavo P. Torquette and Victor S. Nunes and Pedro Y. A. Paiva and Lourenço B. C. Neto and Ana C. Lorena},
  year = {2022},
  eprint = {2212.01897},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2212.01897v1},
}