To cite package ‘crossmap’ in publications use:

  Rossell Hayes A (2024). _crossmap: Apply Functions to All
  Combinations of List Elements_. R package version 0.4.0, ,
  <https://github.com/rossellhayes/crossmap>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {crossmap: Apply Functions to All Combinations of List Elements},
    author = {Alexander {Rossell Hayes}},
    year = {2024},
    note = {R package version 0.4.0, 
},
    url = {https://github.com/rossellhayes/crossmap},
  }