To cite package 'qualV' in publications use:

Jachner S, van den Boogaart KG, Petzoldt T (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.},
  }