To cite bgmm in publications use:

  Przemyslaw Biecek, Ewa Szczurek, Martin Vingron, Jerzy Tiuryn (2012).
  The R Package bgmm: Mixture Modeling with Uncertain Knowledge.
  Journal of Statistical Software, 47(3), 1-32. URL
  http://www.jstatsoft.org/v47/i03/.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {The {R} Package {bgmm}: Mixture Modeling with Uncertain Knowledge},
    author = {Przemyslaw Biecek and Ewa Szczurek and Martin Vingron and Jerzy Tiuryn},
    journal = {Journal of Statistical Software},
    year = {2012},
    volume = {47},
    number = {3},
    pages = {1--32},
    doi = {10.18637/jss.v047.i03},
  }