@InCollection{Matkowski:1985,
  author    = "J. Matkowski",
  title     = "Cauchy functional equation on a restricted domain and commuting functions",
  pages     = "101--106",
  year      = "1985",
  booktitle = "Iteration theory and its functional equations",
  publisher = "Springer",
  address   = "Berlin",
  series    = "Lecture Notes in Mathematics : Vol. 1163",
}