To cite package ‘subformula’ in publications use:

  Moss J (2026). _subformula: Create Subformulas of a Formula_. R
  package version 0.1.0, <https://github.com/jonasmoss/subformula>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {subformula: Create Subformulas of a Formula},
    author = {Jonas Moss},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://github.com/jonasmoss/subformula},
  }