@article{Łenski:2011,
  author  = "W. Łenski and B. Szal",
  title   = "Approximation of functions from L[^rho(omega)_ beta] by linear operators of their Fourier series",
  journal = "Annales Societatis Mathematicae Polonae : Commentationes Mathematicae : Series I",
  volume  = "Vol. 51",
  number  = "no 2",
  pages   = "189--202",
  year    = "2011",
}