@article{Matkowski:2014,
  author  = "J. Matkowski",
  title   = "Invariance identity in the class of generalized quasiarithmetic means",
  journal = "Colloquium Mathematicum",
  volume  = "Vol. 137",
  number  = "no. 2",
  pages   = "221--228",
  year    = "2014",
}