To cite psychomix in publications please use:

Hannah Frick, Carolin Strobl, Friedrich Leisch, Achim Zeileis (2012). Flexible Rasch Mixture Models with Package psychomix. Journal of Statistical Software, 48(7), 1-25. URL http://www.jstatsoft.org/v48/i07/.

If you use Rasch mixture models with a restricted score distribution, please additionally cite:

Hannah Frick, Carolin Strobl, Achim Zeileis (2014). Rasch Mixture Models for DIF Detection: A Comparison of Old and New Score Specifications. Educational and Psychological Measurement, Forthcoming. doi:10.1177/0013164414536183

Corresponding BibTeX entries:

  @Article{,
    title = {Flexible Rasch Mixture Models with Package {psychomix}},
    author = {Hannah Frick and Carolin Strobl and Friedrich Leisch and
      Achim Zeileis},
    journal = {Journal of Statistical Software},
    year = {2012},
    volume = {48},
    number = {7},
    pages = {1--25},
    url = {http://www.jstatsoft.org/v48/i07/},
  }
  @Article{,
    title = {{R}asch Mixture Models for {DIF} Detection: A Comparison
      of Old and New Score Specifications},
    author = {Hannah Frick and Carolin Strobl and Achim Zeileis},
    journal = {Educational and Psychological Measurement},
    year = {2014},
    note = {Forthcoming},
    doi = {10.1177/0013164414536183},
  }