To cite psychomix in publications please use:

Frick H, Strobl C, Leisch F, Zeileis A (2012). “Flexible Rasch Mixture Models with Package psychomix.” Journal of Statistical Software, 48(7), 1–25. http://www.jstatsoft.org/v48/i07/.

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

Frick H, Strobl C, Zeileis A (2015). “Rasch Mixture Models for DIF Detection: A Comparison of Old and New Score Specifications.” Educational and Psychological Measurement, 75(2), 208–234. 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 = {2015},
    volume = {75},
    number = {2},
    pages = {208--234},
    doi = {10.1177/0013164414536183},
  }