To cite package ‘spscsfa’ in publications use:

  Sun K (2026). _spscsfa: Semiparametric Smooth-Coefficient Stochastic
  Frontier Analysis_. R package version 0.1.0,
  <https://CRAN.R-project.org/package=spscsfa>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {spscsfa: Semiparametric Smooth-Coefficient Stochastic Frontier Analysis},
    author = {Kai Sun},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=spscsfa},
  }