Reference. Universal lattices and unbounded rank expanders [kassabov2005universal]

✍️source

@misc{kassabov2005universal,
  title = {Universal Lattices and Unbounded Rank Expanders},
  author = {Kassabov, Martin},
  year = {2005},
  eprint = {math/0502237},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/math/0502237}
}