To cite the 'rpql' package in publications use:

Francis K. C. Hui (2018). rpql: Regularized PQL for Joint Selection in GLMMs.R package version 0.7.

F.K.C., Mueller, S., and Welsh, A.H. (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 = {2018},
    note = {R package version 0.7},
  }
  @Article{,
    title = {Joint Selection in Mixed Models using Regularized PQL},
    author = {F. K. C. Hui and S. Mueller and A. H. Welsh},
    journal = {Journal of the American Statistical Association},
    year = {2017},
    volume = {112},
    pages = {1323--1333},
  }