@article{Kahlig:2009,
author
=
"P.Kahlig and A.Matkowska and J.Matkowski",
title
=
"On a class of composite functional equations in a single variable",
journal
=
"Aequationes Mathematicae",
volume
=
"Vol. 52",
number
=
"no 3",
pages
=
"260--283",
year
=
"1996",
}