@article{Matkowski:2010,
  author  = "J. Matkowski",
  title   = "A functional equation characterizing homographic functions",
  journal = "Annales Mathematicae Silesianae",
  volume  = "no 24",
  pages   = "61--70",
  year    = "2010",
  note    = "Uniwersytet Šl±ski, Katowice",
}