To cite package 'qualV' in publications use:

Jachner, S., K. G. van den Boogaart and T. Petzoldt (2007). Statistical Methods for the Qualitative Assessment of Dynamic Models with Time Delay (R Package qualV). Journal of Statistical Software, 22(8), 1--30.<doi:10.18637/jss.v022.i08>

Corresponding BibTeX entry:

  @Article{,
    title = {Statistical Methods for the Qualitative Assessment of
      Dynamic Models with Time Delay (R Package qualV)},
    author = {{Stefanie Jachner} and {K. Gerald van den Boogaart} and
      {Thomas Petzoldt}},
    journal = {Journal of Statistical Software},
    volume = {22},
    number = {8},
    pages = {1--30},
    year = {2007},
    doi = {10.18637/jss.v022.i08},
    keywords = {ecological modeling, qualitative validation criteria,
      time shift, R.},
  }