To cite package ‘DEM’ in publications use:

  Wang Q, Guo G, Qian G (2022). _DEM: The Distributed EM Algorithms in
  Multivariate Gaussian Mixture Models_. R package version 0.0.0.2,
  <https://CRAN.R-project.org/package=DEM>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {DEM: The Distributed EM Algorithms in Multivariate Gaussian Mixture
Models},
    author = {Qian Wang and Guangbao Guo and Guoqi Qian},
    year = {2022},
    note = {R package version 0.0.0.2},
    url = {https://CRAN.R-project.org/package=DEM},
  }