%0 Journal Article %A Janusz Matkowski %T Invariant graphs of functions for the mean-type mappings %J ESAIM. Proceedings %D 2012 %P 209-216 %V 36 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1051/proc/201236017/ %R 10.1051/proc/201236017 %G en %F EP_2012_36_a17