To cite cAIC4 in publications use:

Säfken B, Rügamer D, Kneib T, Greven S (2021). “Conditional Model Selection in Mixed-Effects Models with cAIC4.” Journal of Statistical Software, 99(8), 1–30. doi:10.18637/jss.v099.i08.

Corresponding BibTeX entry:

  @Article{,
    title = {Conditional Model Selection in Mixed-Effects Models with
      {cAIC4}},
    author = {Benjamin S\"afken and David R\"ugamer and Thomas Kneib
      and Sonja Greven},
    journal = {Journal of Statistical Software},
    year = {2021},
    volume = {99},
    number = {8},
    pages = {1--30},
    doi = {10.18637/jss.v099.i08},
  }