To cite gasper in publications use:

  de Loynes B, Navarro F, Olivier B (2023). “Gasper: GrAph Signal
  ProcEssing in R.” arXiv:2007.10642,
  <https://doi.org/10.48550/arXiv.2007.10642>.

A BibTeX entry for LaTeX users is

  @Misc{deloynes2023,
    title = {Gasper: GrAph Signal ProcEssing in R},
    author = {Basile {de Loynes} and Fabien Navarro and Baptiste Olivier},
    year = {2023},
    eprint = {arXiv:2007.10642},
    url = {https://doi.org/10.48550/arXiv.2007.10642},
  }

or the associated paper:

  de Loynes B, Navarro F, Olivier B (2021). “Data-driven Thresholding
  in Denoising with Spectral Graph Wavelet Transform.” _Journal of
  Computational and Applied Mathematics_, *389*, 113319.
  <https://doi.org/10.1016/j.cam.2020.113319>.

A BibTeX entry for LaTeX users is

  @Article{deloynes2020,
    title = {Data-driven Thresholding in Denoising with Spectral Graph Wavelet Transform},
    author = {Basile {de Loynes} and Fabien Navarro and Baptiste Olivier},
    journal = {Journal of Computational and Applied Mathematics},
    volume = {389},
    pages = {113319},
    year = {2021},
    url = {https://doi.org/10.1016/j.cam.2020.113319},
  }