To cite QZ in a publication use:

Chen, W.-C. (2013) QZ: QZ Decomposition. R Package, URL https://cran.r-project.org/package=QZ

Chen, W.-C. (2019) A Quick Guide for the QZ Package. R Vignette, URL https://cran.r-project.org/package=QZ

Corresponding BibTeX entries:

  @Misc{Chen2013QZpackage,
    title = {{QZ}: {QZ} Decomposition},
    author = {Wei-Chen Chen},
    year = {2013},
    note = {{R} Package, URL https://cran.r-project.org/package=QZ},
  }

  @Manual{Chen2019QZvignette,
    title = {A Quick Guide for the {QZ} Package},
    author = {Wei-Chen Chen},
    year = {2019},
    note = {{R} Vignette, URL https://cran.r-project.org/package=QZ},
  }