@article{Kahlig:1992,
  author  = "P. Kahlig and J. Matkowski",
  title   = "On some aspects of interpolation and functional equations : Selected topics in functional equations and iteration theory (Graz,1991)",
  journal = "Grazer Mathematische Berichte",
  volume  = "316",
  pages   = "93--98",
  year    = "1992",
}