To cite package ‘lqmm’ in publications use:

Geraci M (2014). “Linear Quantile Mixed Models: The lqmm Package for Laplace Quantile Regression.” Journal of Statistical Software, 57(13), 1–29. doi:10.18637/jss.v057.i13.

Geraci M, Bottai M (2014). “Linear quantile mixed models.” Statistics and Computing, 24(3), 461–479. doi:10.1007/s11222-013-9381-9.

A BibTeX entry for LaTeX users is toBibtex(citation('lqmm'))

Corresponding BibTeX entries:

  @Article{,
    title = {Linear Quantile Mixed Models: The {lqmm} Package for
      Laplace Quantile Regression},
    author = {Marco Geraci},
    journal = {Journal of Statistical Software},
    year = {2014},
    volume = {57},
    number = {13},
    pages = {1--29},
    doi = {10.18637/jss.v057.i13},
  }

  @Article{,
    author = {Marco Geraci and Matteo Bottai},
    title = {Linear quantile mixed models},
    journal = {Statistics and Computing},
    volume = {24},
    number = {3},
    pages = {461--479},
    year = {2014},
    doi = {10.1007/s11222-013-9381-9},
  }