To cite package ‘BTYD’ in publications use:

Dziurzynski L, Wadsworth E, McCarthy D (2022). BTYD: Implementing BTYD Models with the Log Sum Exp Patch. R package version 2.4.3, https://github.com/ghuiber/btyd.

Corresponding BibTeX entry:

  @Manual{,
    title = {BTYD: Implementing BTYD Models with the Log Sum Exp
      Patch},
    author = {Lukasz Dziurzynski and Edward Wadsworth and Daniel
      McCarthy},
    year = {2022},
    note = {R package version 2.4.3},
    url = {https://github.com/ghuiber/btyd},
  }