@article{HinzSchwarz2022,
  author    = {Michael Hinz and Michael Schwarz},
  title     = {A note on Neumann problems on graphs},
  journal   = {Positivity},
  volume    = {26},
  number    = {4},
  doi       = {10.1007/s11117-022-00930-0},
  year      = {2022},
}