@article{Mohapatra:2018,
  author  = "R. Mohapatra and B. Szal",
  title   = "On trigonometric approximation of functions in the Lq norm",
  journal = "Demonstratio Mathematica",
  volume  = "Vol. 51",
  number  = "iss. 1",
  pages   = "17--26",
  year    = "2018",
}