To cite brms in publications use:

Bürkner P (2017). “brms: An R Package for Bayesian Multilevel Models Using Stan.” Journal of Statistical Software, 80(1), 1–28. doi:10.18637/jss.v080.i01.

Bürkner P (2018). “Advanced Bayesian Multilevel Modeling with the R Package brms.” The R Journal, 10(1), 395–411. doi:10.32614/RJ-2018-017.

Bürkner P (2021). “Bayesian Item Response Modeling in R with brms and Stan.” Journal of Statistical Software, 100(5), 1–54. doi:10.18637/jss.v100.i05.

Corresponding BibTeX entries:

  @Article{,
    title = {{brms}: An {R} Package for {Bayesian} Multilevel Models
      Using {Stan}},
    author = {Paul-Christian Bürkner},
    journal = {Journal of Statistical Software},
    year = {2017},
    volume = {80},
    number = {1},
    pages = {1--28},
    doi = {10.18637/jss.v080.i01},
    encoding = {UTF-8},
  }

  @Article{,
    title = {Advanced {Bayesian} Multilevel Modeling with the {R}
      Package {brms}},
    author = {Paul-Christian Bürkner},
    journal = {The R Journal},
    year = {2018},
    volume = {10},
    number = {1},
    pages = {395--411},
    doi = {10.32614/RJ-2018-017},
    encoding = {UTF-8},
  }

  @Article{,
    title = {Bayesian Item Response Modeling in {R} with {brms} and
      {Stan}},
    author = {Paul-Christian Bürkner},
    journal = {Journal of Statistical Software},
    year = {2021},
    volume = {100},
    number = {5},
    pages = {1--54},
    doi = {10.18637/jss.v100.i05},
    encoding = {UTF-8},
  }