@article{Domsta:2009,
author
=
"J.Domsta and J.Matkowski",
title
=
"Invariance of the arithmetic mean with respect to special mean-type mappings",
journal
=
"Aequationes Mathematicae",
volume
=
"Vol. 71",
pages
=
"70--85",
year
=
"2006",
}