@misc{soberon-2016-helly-diameter,
  title = {{Helly-type theorems for the diameter}},
  author = {Pablo Soberón},
  year = {2016},
  eprint = {1509.07908},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1509.07908},
  note = {Bull. London Math. Soc. 48 (4), 577–588.}
}