To cite spikeslab in publications use:

Ishwaran H., Rao J.S. and Kogalur U.B. (2022). spikeslab : Prediction and Variable Selection Using Spike and Slab Regression, R package version 1.1.6.

Ishwaran H. and Rao J.S. (2005). Spike and slab variable selection: frequentist and Bayesian strategies.Ann. Statist. 33(2), 730--773.

Ishwaran H. and Rao J.S. (2010). Geometry and properties of gneralized ridge regression in high dimensionsContemp. Math. 62, 82--93.

Corresponding BibTeX entries:

  @Manual{,
    title = {spikeslab : Prediction and Variable Selection Using Spike
      and Slab Regression},
    author = {H. Ishwaran and J.S. Rao and U.B. Kogalur},
    publisher = {manual},
    year = {2022},
    note = {R package version 1.1.6},
    url = {https://cran.r-project.org/package=spikeslab},
    pdf =
      {https://cran.r-project.org/web/packages/spikeslab/spikeslab.pdf},
  }

  @Article{,
    title = {Spike and slab variable selection: frequentist and
      Bayesian strategies},
    author = {H. Ishwaran and J.S. Rao},
    journal = {Ann. Statist.},
    year = {2005},
    volume = {33},
    number = {2},
    pages = {730--773},
    url = {https://arXiv.org/abs/math/0505633v1},
    pdf = {https://arxiv.org/pdf/math.ST/0505633},
  }

  @Article{,
    title = {Geometry and properties of gneralized ridge regression in
      high dimensions},
    author = {H. Ishwaran and J.S. Rao},
    journal = {Contemporary Mathematics},
    year = {2014},
    volume = {62},
    pages = {82--93},
  }