To cite the 'rpql' package in publications use:

Hui F (2025). rpql: Regularized PQL for Joint Selection in GLMMs. R package version 0.8.2.

Hui F, Mueller S, Welsh A (2017). “Joint Selection in Mixed Models using Regularized PQL.” Journal of the American Statistical Association, 112, 1323–1333.

Corresponding BibTeX entries:

  @Manual{,
    title = {rpql: Regularized PQL for Joint Selection in GLMMs},
    author = {Francis K. C. Hui},
    year = {2025},
    note = {R package version 0.8.2},
    encoding = {UTF-8},
  }

  @Article{,
    title = {Joint Selection in Mixed Models using Regularized PQL},
    author = {Francis K. C. Hui and Samuel Mueller and A. H. Welsh},
    journal = {Journal of the American Statistical Association},
    year = {2017},
    volume = {112},
    pages = {1323--1333},
    encoding = {UTF-8},
  }