@misc{bartoszynski1999intersection,
  title={Intersection of less than continuum ultrafilters may have measure zero},
  author={Tomek Bartoszynski and Saharon Shelah},
  year={1999},
  eprint={math/9904068},
  archivePrefix={arXiv},
  primaryClass={math.LO},
  url={https://arxiv.org/abs/math/9904068}
}