To cite flexCWM in publications use:

Angelo Mazza, Antonio Punzo, Salvatore Ingrassia (2018). flexCWM: A Flexible Framework for Cluster-Weighted Models. Journal of Statistical Software, 86(2), 1-30.<doi:10.18637/jss.v086.i02>

Corresponding BibTeX entry:

  @Article{,
    title = {{flexCWM}: A Flexible Framework for Cluster-Weighted
      Models},
    author = {Angelo Mazza and Antonio Punzo and Salvatore Ingrassia},
    journal = {Journal of Statistical Software},
    year = {2018},
    volume = {86},
    number = {2},
    pages = {1--30},
    doi = {10.18637/jss.v086.i02},
  }