To cite package ‘conicfit’ in publications use:

Gama J, Chernov N (2015). conicfit: Algorithms for Fitting Circles, Ellipses and Conics Based on the Work by Prof. Nikolai Chernov. R package version 1.0.4, https://CRAN.R-project.org/package=conicfit.

Corresponding BibTeX entry:

  @Manual{,
    title = {conicfit: Algorithms for Fitting Circles, Ellipses and
      Conics Based on the Work by Prof. Nikolai Chernov},
    author = {Jose Gama and Nikolai Chernov},
    year = {2015},
    note = {R package version 1.0.4},
    url = {https://CRAN.R-project.org/package=conicfit},
  }