To cite fastSOM in publications use

Stefan Kloessner Sven Wagner (2016). fastSOM: Calculation of Spillover Measures. R package version 1.0.0. URL http://CRAN.R-project.org/package=fastSOM

Corresponding BibTeX entry:

  @Manual{,
    title = {{fastSOM}: Calculation of Spillover Measures},
    author = {Stefan Kl\"o{\ss}ner and Sven Wagner},
    year = {2016},
    note = {R package version 1.0.0},
    url = {http://CRAN.R-project.org/package=fastSOM},
  }