To cite package ‘msda’ in publications use:

  Mai Q, Yang Y, Zou H (2025). _msda: Multi-Class Sparse Discriminant
  Analysis_. R package version 1.0.4,
  <https://CRAN.R-project.org/package=msda>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {msda: Multi-Class Sparse Discriminant Analysis},
    author = {Qing Mai and Yi Yang and Hui Zou},
    year = {2025},
    note = {R package version 1.0.4},
    url = {https://CRAN.R-project.org/package=msda},
  }