To cite package 'ssgraph' in publications use:

Mohammadi, R. (2019-03-19). ssgraph: Bayesian Graphical Estimation using Spike-and-Slab Priors.R package version 1.8.

Corresponding BibTeX entry:

  @Manual{,
    title = {ssgraph: Bayesian Graphical Estimation using
      Spike-and-Slab Priors},
    author = {Reza Mohammadi},
    year = {2019-03-19},
    note = {R package version 1.8},
  }