@article{Jarczyk:2009,
author
=
"J.Jarczyk and J.Matkowski",
title
=
"Invariance in the class of weighted quasi-arithmetic means",
journal
=
"Annales Polonici Mathematici",
volume
=
"Vol. 88",
number
=
"no 1",
pages
=
"39--51",
year
=
"2006",
}