To cite package ‘rmdcev’ in publications use:

  Patrick Lloyd-Smith (2020). rmdcev: Kuhn-Tucker and Multiple
  Discrete-Continuous Extreme Value Models. R package version 1.3.3.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {rmdcev: Kuhn-Tucker and Multiple Discrete-Continuous Extreme Value
Models},
    author = {Patrick Lloyd-Smith},
    year = {2020},
    note = {R package version 1.3.3},
    url = {https://github.com/plloydsmith/rmdcev},
  }