@article{Kahlig:2015,
  author  = "P. Kahlig and J. Matkowski",
  title   = "Iterative functional equations related to a competition equation",
  journal = "Aequationes Mathematicae",
  volume  = "Vol. 89",
  number  = "no. 3",
  pages   = "613--624",
  year    = "2015",
}