To cite clustvarsel in publications use:

Scrucca L and Raftery AE (2018). “clustvarsel: A Package Implementing Variable Selection for Gaussian Model-Based Clustering in R.” Journal of Statistical Software, 84(1), pp. 1–28. doi: 10.18637/jss.v084.i01.

Corresponding BibTeX entry:

  @Article{,
    title = {{clustvarsel}: A Package Implementing Variable Selection
      for Gaussian Model-Based Clustering in {R}},
    author = {Luca Scrucca and Adrian E. Raftery},
    journal = {Journal of Statistical Software},
    year = {2018},
    volume = {84},
    number = {1},
    pages = {1--28},
    doi = {10.18637/jss.v084.i01},
  }