@article{theexternalvalidityofcombinatorial,
  title = {Sample Observed Effects: Enumeration, Randomization and Generalization},
  author = {Andre F. Ribeiro},
  year = {2021},
  eprint = {2108.04376},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2108.04376v6},
}