@article{HellwigVolkmann2013,
  author    = {Angelika Hellwig and Lutz Volkmann},
  title     = {Neighborhood and degree conditions for super-edge-connected bipartite digraphs},
  journal   = {Results in mathematics},
  volume    = {Vol. 45},
  number    = {Iss. 1-2},
  pages     = {45 -- 58},
  year      = {2013},
}