@article{Kahlig:1997,
  author  = "P. Kahlig and J. Matkowski",
  title   = "On the composition of homogenous quasarithmetic means",
  journal = "Journal of Mathematical Analysis and Applications",
  volume  = "Vol. 216",
  number  = "no 1",
  pages   = "69--85",
  year    = "1997",
}