@article{HarrellKennedyRamos2026,
  author = {Evans M. Harrell II and James B. Kennedy and Gabriel J. Ramos},
  title = {Bounds on eigenvalue ratios of quantum graph Laplacians},
  journal = {arXiv preprint arXiv:2603.26172},
  year = {2026},
  note = {Current manuscript date: 24 August 2026}
}

@article{BerkolaikoKennedyKurasovMugnolo2017,
  author = {Gregory Berkolaiko and James B. Kennedy and Pavel Kurasov and Delio Mugnolo},
  title = {Edge connectivity and the spectral gap of combinatorial and quantum graphs},
  journal = {Journal of Physics A: Mathematical and Theoretical},
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  pages = {365201},
  year = {2017}
}

@article{BerkolaikoKennedyKurasovMugnolo2019,
  author = {Gregory Berkolaiko and James B. Kennedy and Pavel Kurasov and Delio Mugnolo},
  title = {Surgery principles for the spectral analysis of quantum graphs},
  journal = {Transactions of the American Mathematical Society},
  volume = {372},
  pages = {5153--5197},
  year = {2019}
}

@article{BerkolaikoLatushkinSukhtaiev2019,
  author = {Gregory Berkolaiko and Yuri Latushkin and Selim Sukhtaiev},
  title = {Limits of quantum graph operators with shrinking edges},
  journal = {Advances in Mathematics},
  volume = {352},
  pages = {632--669},
  year = {2019}
}

@book{BerkolaikoKuchment2013,
  author = {Gregory Berkolaiko and Peter Kuchment},
  title = {Introduction to Quantum Graphs},
  series = {Mathematical Surveys and Monographs},
  volume = {186},
  publisher = {American Mathematical Society},
  year = {2013}
}

@article{Friedlander2005,
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  year = {2005}
}

@article{Nicaise1987,
  author = {Serge Nicaise},
  title = {Spectre des reseaux topologiques finis},
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}

@book{Kurasov2024,
  author = {Pavel Kurasov},
  title = {Spectral Geometry of Graphs},
  series = {Operator Theory: Advances and Applications},
  volume = {293},
  publisher = {Birkhauser},
  year = {2024}
}