To cite CADFtest in publications use:

Claudio Lupi (2009). Unit Root CADF Testing with R. Journal of Statistical Software, 32(2), 1-19. URL http://www.jstatsoft.org/v32/i02/.

Corresponding BibTeX entry:

  @Article{,
    title = {Unit Root CADF Testing with {R}},
    author = {Claudio Lupi},
    journal = {Journal of Statistical Software},
    year = {2009},
    volume = {32},
    number = {2},
    pages = {1--19},
    url = {http://www.jstatsoft.org/v32/i02/},
  }