To cite package ‘Ryacas0’ in publications use:

  Andersen M, Goedman R, Grothendieck G, Højsgaard S, Mazur G, Pinkus A
  (2024). _Ryacas0: Legacy 'Ryacas' (Interface to 'Yacas' Computer
  Algebra System)_. R package version 0.4.4, ,
  <https://github.com/r-cas/ryacas0>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Ryacas0: Legacy 'Ryacas' (Interface to 'Yacas' Computer Algebra System)},
    author = {Mikkel Meyer Andersen and Rob Goedman and Gabor Grothendieck and Søren Højsgaard and Grzegorz Mazur and Ayal Pinkus},
    year = {2024},
    note = {R package version 0.4.4, },
    url = {https://github.com/r-cas/ryacas0},
  }