To cite libstable/libstableR/v78i01-replication.tar.gz in publications use:

Royuela-del-Val J, Simmross-Wattenberg F, Alberola-L√≥pez C (2017). “libstable: Fast, Parallel, and High-Precision Computation of $lpha$-Stable Distributions in R, C/C++, and MATLAB.” Journal of Statistical Software, 78(1), 1–25. doi:10.18637/jss.v078.i01.

Corresponding BibTeX entry:

  @Article{,
    title = {{libstable}: Fast, Parallel, and High-Precision
      Computation of $<07>lpha$-Stable Distributions in {R}, {C/C++}, and
      {MATLAB}},
    author = {Javier Royuela-del-Val and Federico Simmross-Wattenberg
      and Carlos Alberola-L{\'o}pez},
    journal = {Journal of Statistical Software},
    year = {2017},
    volume = {78},
    number = {1},
    pages = {1--25},
    doi = {10.18637/jss.v078.i01},
  }