@article{Matkowski:2010,
  author  = "J. Matkowski and J. Okrzesik",
  title   = "On some generalizations of Goł±b-Schinzel functional equation",
  journal = "Scientific Issues of Jan Długosz University in Częstochowa. Mathematics",
  volume  = "Vol. 15",
  pages   = "81--90",
  year    = "2010",
  note = "",
}