To cite package ‘Sshaped’ in publications use:

Feng O, Chen Y, Han Q, Carroll R, Samworth R (2025). Sshaped: Nonparametric, Tuning-Free Estimation of S-Shaped Functions. R package version 1.2, https://CRAN.R-project.org/package=Sshaped.

Corresponding BibTeX entry:

  @Manual{,
    title = {Sshaped: Nonparametric, Tuning-Free Estimation of S-Shaped
      Functions},
    author = {Oliver Y. Feng and Yining Chen and Qiyang Han and Raymond
      J. Carroll and Richard J. Samworth},
    year = {2025},
    note = {R package version 1.2},
    url = {https://CRAN.R-project.org/package=Sshaped},
  }