To cite package ‘zmij’ in publications use:

  Xiao N (2026). _zmij: Round-Trip-Safe Double-Precision Formatting_. R
  package version 0.1.0, <https://github.com/nanxstats/zmij>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {zmij: Round-Trip-Safe Double-Precision Formatting},
    author = {Nan Xiao},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://github.com/nanxstats/zmij},
  }