To cite package 'openCR' in publications use:

Efford M (2020). openCR: Open population capture-recapture models. R package version 1.4.4, https://CRAN.R-project.org/package=openCR/.

Corresponding BibTeX entry:

  @Manual{,
    title = {openCR: Open population capture-recapture models},
    author = {Murray Efford},
    year = {2020},
    note = {R package version 1.4.4},
    url = {https://CRAN.R-project.org/package=openCR/},
  }