@article{,
    AUTHOR = {G{\l}azowska, Dorota},
     TITLE = {A solution of an open problem concerning Lagrangian mean-type mappings},
   JOURNAL = {Cent. Eur. J. Math.},
  FJOURNAL = {Central European Journal of Mathematics},
    VOLUME = {9},
      YEAR = {2011},
    NUMBER = {5},
     PAGES = {1067-1073},
}