To cite package ‘eFCM’ in publications use:

  Li M, Castro-Camilo D (2025). _eFCM: Exponential Factor Copula
  Model_. R package version 1.0,
  <https://CRAN.R-project.org/package=eFCM>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {eFCM: Exponential Factor Copula Model},
    author = {Mengran Li and Daniela Castro-Camilo},
    year = {2025},
    note = {R package version 1.0},
    url = {https://CRAN.R-project.org/package=eFCM},
  }