To cite HGLMMM in publications use:

Marek Molas, Emmanuel Lesaffre (2011). Hierarchical Generalized Linear Models: The R Package HGLMMM. Journal of Statistical Software, 39(13), 1-20. URL http://www.jstatsoft.org/v39/i13/.

Corresponding BibTeX entry:

  @Article{,
    title = {Hierarchical Generalized Linear Models: The {R} Package
      {HGLMMM}},
    author = {Marek Molas and Emmanuel Lesaffre},
    journal = {Journal of Statistical Software},
    year = {2011},
    volume = {39},
    number = {13},
    pages = {1--20},
    url = {http://www.jstatsoft.org/v39/i13/},
  }