To cite package ‘RcppNLoptExample’ in publications use:

  Eddelbuettel D (2025). _RcppNLoptExample: 'Rcpp' Package Illustrating
  Header-Only Access to 'NLopt'_. R package version 0.0.2.1, ,
  <https://github.com/eddelbuettel/rcppnloptexample>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {RcppNLoptExample: 'Rcpp' Package Illustrating Header-Only Access to 'NLopt'},
    author = {Dirk Eddelbuettel},
    year = {2025},
    note = {R package version 0.0.2.1, 
},
    url = {https://github.com/eddelbuettel/rcppnloptexample},
  }