Which Graphs have Non-integral Spectra?

Katja Mönius, Jörn Steuding, Pascal Stumpf. Which Graphs have Non-integral Spectra?. Graphs and Combinatorics, 34(6):1507-1518, 2018. [doi]

@article{MoniusSS18,
  title = {Which Graphs have Non-integral Spectra?},
  author = {Katja Mönius and Jörn Steuding and Pascal Stumpf},
  year = {2018},
  doi = {10.1007/s00373-018-1947-z},
  url = {https://doi.org/10.1007/s00373-018-1947-z},
  researchr = {https://researchr.org/publication/MoniusSS18},
  cites = {0},
  citedby = {0},
  journal = {Graphs and Combinatorics},
  volume = {34},
  number = {6},
  pages = {1507-1518},
}