@misc{asencio2023gordo,
  title={The El Gordo galaxy cluster challenges ΛCDM for any plausible collision velocity},
  author={E. Asencio and I. Banik and P. Kroupa},
  year={2023},
  eprint={2308.00744},
  archivePrefix={arXiv},
  primaryClass={astro-ph.CO},
  url={https://arxiv.org/abs/2308.00744}
}