To cite package ‘arcopt’ in publications use:

  Waldman, M. (2026). arcopt: Adaptive Regularization using Cubics for
  R. R package version 0.2.0.9000.
  https://github.com/marcus-waldman/arcopt

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {arcopt: Adaptive Regularization using Cubics for R},
    author = {{Marcus Waldman}},
    year = {2026},
    note = {R package version 0.2.0.9000},
    url = {https://github.com/marcus-waldman/arcopt},
  }

  Cartis, C., Gould, N. I. M., & Toint, P. L. (2011). Adaptive cubic
  regularisation methods for unconstrained optimization. Part I:
  Motivation, convergence and numerical results. Mathematical
  Programming, 127(2), 245-295.
  https://doi.org/10.1007/s10107-009-0286-5

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Adaptive cubic regularisation methods for unconstrained optimization. Part I: Motivation, convergence and numerical results},
    author = {Coralia Cartis and Nicholas I. M. Gould and Philippe L. Toint},
    journal = {Mathematical Programming},
    year = {2011},
    volume = {127},
    number = {2},
    pages = {245-295},
    doi = {10.1007/s10107-009-0286-5},
  }