To cite arf3DS4 in publications use:

Wouter D. Weeda, Frank de Vos, Lourens J. Waldorp, Raoul P.P.P. Grasman, Hilde M. Huizenga (2011). arf3DS4: An Integrated Framework for Localization and Connectivity Analysis of fMRI Data. Journal of Statistical Software, 44(14), 1-33. URL http://www.jstatsoft.org/v44/i14/.

Corresponding BibTeX entry:

  @Article{,
    title = {{arf3DS4}: An Integrated Framework for Localization and
      Connectivity Analysis of fMRI Data},
    author = {Wouter D. Weeda and Frank de Vos and Lourens J. Waldorp
      and Raoul P. P. P. Grasman and Hilde M. Huizenga},
    journal = {Journal of Statistical Software},
    year = {2011},
    volume = {44},
    number = {14},
    pages = {1--33},
    url = {http://www.jstatsoft.org/v44/i14/},
  }