@article{Izumi:2014,
  author  = "H. Izumi and J. Matkowski",
  title   = "Invariant translative mappings and a functional equation",
  journal = "Acta Mathematica Hungarica",
  volume  = "Vol. 143",
  number  = "no. 1",
  pages   = "220--231",
  year    = "2014",
}