Kindly cite the pxweb R package as follows:

Magnusson M, Kainu M, Huovari J, Lahti L (2019). “pxweb: R tools for PX-WEB API.”

Corresponding BibTeX entry:

  @Misc{,
    title = {pxweb: R tools for PX-WEB API},
    author = {Mans Magnusson and Markus Kainu and Janne Huovari and Leo
      Lahti},
    year = {2019},
  }