@article{Głazowska:2011,
  author  = "D. Głazowska",
  title   = "A solution of an open problem concerning Lagrangian mean-type mappings",
  journal = "Central European Journal of Mathematics",
  volume  = "Vol. 9",
  number  = "no 5",
  pages   = "1067--1073",
  year    = "2011",
}