To cite package ‘SUITOR’ in publications use:

  Lee D, Zhu B (2021). “SUITOR: Selecting the number of mutational
  signatures through cross-validation.” _bioRxiv_.
  <https://doi.org/10.1101/2021.07.28.454269>.

A BibTeX entry for LaTeX users is

  @Article{SUITOR,
    title = {{SUITOR}: Selecting the number of mutational signatures through cross-validation},
    author = {Donghyuk Lee and Bin Zhu},
    journal = {bioRxiv},
    year = {2021},
    url = {https://doi.org/10.1101/2021.07.28.454269},
  }