@article{Matkowski:2009,
author
=
"J.Matkowski and M.Wróbel",
title
=
"A generalized $a$-Wright convexity and related functional equation",
journal
=
"Annales Mathematicae Silesianae : Uniwersytet Śląski ; Katowice",
volume
=
"nr 10",
pages
=
"7--12",
year
=
"1996",
}