@article{HoefnerMoeller2012,
  author    = {Peter H{\"o}fner and Bernhard M{\"o}ller},
  title     = {Dijkstra, Floyd and Warshall meet Kleene},
  journal   = {Formal Aspects of Computing},
  volume    = {24},
  number    = {4-6},
  pages     = {459 -- 476},
  doi       = {10.1007/s00165-012-0245-4},
  year      = {2012},
}