To cite simPop in publications use:

Templ M, Meindl B, Kowarik A, Dupriez O (2017). “Simulation of Synthetic Complex Data: The R Package simPop.” Journal of Statistical Software, 79(10), 1–38. doi:10.18637/jss.v079.i10.

Corresponding BibTeX entry:

    title = {Simulation of Synthetic Complex Data: The {R} Package
    author = {Matthias Templ and Bernhard Meindl and Alexander Kowarik
      and Olivier Dupriez},
    journal = {Journal of Statistical Software},
    year = {2017},
    volume = {79},
    number = {10},
    pages = {1--38},
    doi = {10.18637/jss.v079.i10},