To cite MixfMRI in a publication use:

Chen, W.-C. and Maitra, R. (2018) MixfMRI: fMRI Clustering Analysis. R Package, URL http://cran.r-project.org/package=MixfMRI

Corresponding BibTeX entry:

  @Misc{Chen2018MixfMRIpackage,
    title = {{MixfMRI}: {fMRI} Clustering Analysis},
    author = {Wei-Chen Chen and Ranjan Maitra},
    year = {2018},
    note = {{R} Package, URL
      http://cran.r-project.org/package=MixfMRI},
  }