To cite package ‘psme’ in publications use:

Li Z (2025). psme: Penalized Splines Mixed-Effects Models. R package version 1.0.0, https://github.com/zheyuanli/psme.

Corresponding BibTeX entry:

  @Manual{,
    title = {psme: Penalized Splines Mixed-Effects Models},
    author = {Zheyuan Li},
    year = {2025},
    note = {R package version 1.0.0},
    url = {https://github.com/zheyuanli/psme},
  }