@article{Kranz:2017,
  author  = "R. Kranz and A. Rzepka",
  title   = "On the approximation of integrable functions by some special matrix means of Fourier series",
  journal = "Demonstratio Mathematica",
  volume  = "Vol. 50",
  pages   = "351--359",
  year    = "2017",
}