To cite R2ucare in publications use:

Gimenez O, Lebreton J, Choquet R, Pradel R (2018). “R2ucare: An R package to perform goodness-of-fit tests for capture–recapture models.” Methods in Ecology and Evolution, 9, 1749–1754. https://oliviergimenez.github.io/R2ucare/.

Corresponding BibTeX entry:

  @Article{,
    title = {R2ucare: An R package to perform goodness-of-fit tests for
      capture–recapture models},
    author = {Olivier Gimenez and Jean-Dominique Lebreton and Rémi
      Choquet and Roger Pradel},
    journal = {Methods in Ecology and Evolution},
    year = {2018},
    volume = {9},
    pages = {1749--1754},
    url = {https://oliviergimenez.github.io/R2ucare/},
  }