To cite package ‘mpem’ in publications use:

  Lu H, Andrews J, Browne R (2026). _mpem: Matrix Partial EM for
  Incomplete Matrix-Normal Data_. R package version 0.1.0,
  <https://github.com/lhzmix/mpem>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {mpem: Matrix Partial EM for Incomplete Matrix-Normal Data},
    author = {Hanzhang Lu and Jeffrey L. Andrews and Ryan P. Browne},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://github.com/lhzmix/mpem},
  }