To cite package ‘deformula’ in publications use:

Okamura H (2026). deformula: Integration of One-Dimensional Functions with Double Exponential Formulas. R package version 0.1.3, https://github.com/okamumu/deformula.

Corresponding BibTeX entry:

  @Manual{,
    title = {deformula: Integration of One-Dimensional Functions with
      Double Exponential Formulas},
    author = {Hiroyuki Okamura},
    year = {2026},
    note = {R package version 0.1.3},
    url = {https://github.com/okamumu/deformula},
  }