To cite package ‘lisp’ in publications use:

  Danenberg P (2026). _lisp: List-Processing à La 'SRFI-1'_. R package
  version 0.2, <https://github.com/klutometis/r-lisp>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {lisp: List-Processing à La 'SRFI-1'},
    author = {Peter Danenberg},
    year = {2026},
    note = {R package version 0.2},
    url = {https://github.com/klutometis/r-lisp},
  }