@unpublished{palma2020lightning,
  author = {Blanchini, Franco and Casagrande, Daniele and Fabiani, Filippo and Giordano, Giulia and Palma, David and Pesenti, Raffaele},
  doi = {10.48550/arXiv.2007.08980},
  institution = {arXiv:2007.08980},
  pages = {1--28},
  title = {Lightning optimizes: a threshold mechanism ensures minimum-path flow},
  year = {2020}
}