To cite FitAR in publications use:

Ying Zhang, Hao Yu and A. I. McLeod (2011). Maximum likelihood unit root test Working Paper

Corresponding BibTeX entry:

  @Article{,
    title = {Maximum likelihood unit root test},
    author = {Ying Zhang and Hao Yu and A. I. McLeod},
    year = {2011},
    journal = {Working Paper},
  }