@article{HellwigVolkmann2013,
  author    = {Angelika Hellwig and Lutz Volkmann},
  title     = {Maximally local-edge-connected graphs and digraphs},
  journal   = {Ars combinatoria},
  volume    = {Vol. 72},
  pages     = {295 -- 306},
  year      = {2013},
}