To cite multgee in publications use:

Touloumis A (2015). “R Package multgee: A Generalized Estimating Equations Solver for Multinomial Responses.” Journal of Statistical Software, 64(8), 1–14. http://www.jstatsoft.org/v64/i08/.

To cite the methodology implemented in multgee in publications use:

Touloumis A, Agresti A, Kateri M (2013). “GEE for multinomial responses using a local odds ratios parameterization.” Biometrics, 69(3), 633–640. http://onlinelibrary.wiley.com/enhanced/doi/10.1111/biom.12054/.

Corresponding BibTeX entries:

  @Article{,
    title = {{R} Package {multgee}: A Generalized Estimating Equations
      Solver for Multinomial Responses},
    author = {Anestis Touloumis},
    journal = {Journal of Statistical Software},
    year = {2015},
    volume = {64},
    number = {8},
    pages = {1--14},
    url = {http://www.jstatsoft.org/v64/i08/},
  }

  @Article{,
    title = {GEE for multinomial responses using a local odds ratios
      parameterization},
    author = {Anestis Touloumis and Alan Agresti and Maria Kateri},
    journal = {Biometrics},
    year = {2013},
    volume = {69},
    number = {3},
    pages = {633--640},
    url =
      {http://onlinelibrary.wiley.com/enhanced/doi/10.1111/biom.12054/},
  }