To cite package ‘SPsimSeq’ in publications use:

  Assefa A, Hawinkel S, Vandesompele J, Thas O, R Core Team (????).
  _SPsimSeq: Semi-parametric simulation tool for bulk and single-cell
  RNA sequencing data_. R package version 1.15.0.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{SPsimSeq}: Semi-parametric simulation tool for bulk and single-cell RNA sequencing data},
    author = {Alemu Takele Assefa and Stijn Hawinkel and Jo Vandesompele and Olivier Thas and {R Core Team}},
    note = {R package version 1.15.0},
  }