To cite package ‘onls’ in publications use:

Andrej-Nikolai Spiess (2026). onls: Orthogonal Nonlinear Least-Squares Regression. R package version 0.2, https://CRAN.R-project.org/package=onls.

Corresponding BibTeX entry:

  @Manual{,
    title = {onls: Orthogonal Nonlinear Least-Squares Regression},
    author = {{Andrej-Nikolai Spiess}},
    year = {2026},
    note = {R package version 0.2},
    url = {https://CRAN.R-project.org/package=onls},
  }