@article{Szal:2009,
author
=
"B.Szal",
title
=
"Generalization of a theorem on Besov-Nikol'skii classes",
journal
=
"Acta Mathematica Hungarica",
volume
=
"Vol. 125",
number
=
"no 1-2",
pages
=
"161--181",
year
=
"2009",
}