@article{Drgas-Burchardt:2007,
  author  = "E. Drgas-Burchardt and A. Fiedorowicz",
  title   = "Cost colourings of hypergraphs",
  journal = "Discrete Mathematics",
  volume  = "Vol. 307",
  number  = "iss. 11-12",
  pages   = "1298--1305",
  year    = "2007",
}