@article{Matkowski:1999,
  author  = "J. Matkowski",
  title   = "Iterations of mean-type mappings and invariant means",
  journal = "Annales Mathematicae Silesianae : Prace Naukowe Uniwersytetu Šl±skiego w Katowicach",
  volume  = "nr 13",
  number  = "1830",
  pages   = "211--226",
  year    = "1999",
  note    = "Uniwersytet Šl±ski, Katowice",
}