@article{KellerPinchoverPogorzelski2019,
  author    = {Matthias Keller and Yehuda Pinchover and Felix Pogorzelski},
  title     = {Criticality theory for Schr{\"o}dinger operators on graphs},
  journal   = {Journal of spectral theory},
  volume    = {10},
  number    = {1},
  pages     = {73 -- 114},
  doi       = {10.4171/JST/286},
  year      = {2019},
}