To cite ARDL in publications use:

Natsiopoulos K, Tzeremes N (2020). ARDL: ARDL, ECM and Bounds-Test for Cointegration. Ph.D. thesis, University of Thessaly, Department of Economics. R package version 0.1.0, https://github.com/Natsiopoulos/ARDL.

Corresponding BibTeX entry:

  @PhdThesis{,
    title = {{ARDL}: ARDL, ECM and Bounds-Test for Cointegration},
    author = {Kleanthis Natsiopoulos and Nickolaos Tzeremes},
    school = {University of Thessaly, Department of Economics},
    year = {2020},
    note = {R package version 0.1.0},
    url = {https://github.com/Natsiopoulos/ARDL},
  }