@article{Borowiecki:2000,
  author  = "M. Borowiecki and E. Łazuka",
  title   = "Chromatic polynomials of hypergraphs",
  journal = "Discussiones Mathematicae : Graph Theory",
  volume  = "Vol. 20",
  number  = "no 2",
  pages   = "293--301",
  year    = "2000",
}