@article{Łenski:2011,
author
=
"W.Łenski and B.Szal",
title
=
"Approximation of integrable functions by general linear operators of their Fourier series at the Lebesgue points",
journal
=
"Acta Mathematica Hungarica",
volume
=
"Vol. 131",
number
=
"no 4",
pages
=
"380--394",
year
=
"2011",
}