@article{HellwigVolkmann2006,
  author    = {Hellwig, Angelika and Volkmann, Lutz},
  title     = {Lower bounds on the vertex-connectivity of digraphs and graphs},
  series = {Information processing letters},
  volume    = {Vol. 99},
  journal   = {Information processing letters},
  number    = {Iss. 2},
  issn      = {1872-6119 (E-Journal); 0020-0190 (Print)},
  pages     = {41 -- 46},
  year      = {2006},
  language  = {en}
}