@article{rollingoriginvalidationreversesmodelrank,
  title = {Rolling-Origin Validation Reverses Model Rankings in Multi-Step PM10 Forecasting: XGBoost, SARIMA, and Persistence},
  author = {Federico Garcia Crespi and Eduardo Yubero Funes and Marina Alfosea Simon},
  year = {2026},
  eprint = {2603.20315},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2603.20315},
}