@article{Matkowski:2009,
author
=
"J.Matkowski and J.Rätz",
title
=
"A characterization of L\p -norm with the aid of equality condition in the Hölder inequality",
journal
=
"Demonstratio Mathematica",
volume
=
"Vol. 32",
number
=
"no 1",
pages
=
"165--170",
year
=
"1999",
}