To cite iterLap in publications use:

Bornkamp, B. (2011) iterLap: Iterated Laplace Approximations. URL http://CRAN.R-project.org/package=iterLap
Bornkamp, B. (2011) Approximating Probability Densities by Iterated Laplace Approximations. Journal of Computational and Graphical Statistics, 20, 656-669

Corresponding BibTeX entries:

  @Manual{,
    title = {iterLap: Iterated Laplace Approximations},
    author = {{Bornkamp} and {B.}},
    year = {2011},
    url = {http://CRAN.R-project.org/package=iterLap},
  }
  @Article{,
    title = {Approximating Probability Densities by Iterated Laplace
      Approximations},
    journal = {Journal of Computational and Graphical Statistics},
    volume = {20},
    pages = {656-669},
    year = {2011},
    author = {B. Bornkamp},
  }