To cite bigGP in publications use:

Paciorek CJ, Lipshitz B, Zhuo W, Prabhat, Kaufman CG, Thomas RC (2015). “Parallelizing Gaussian Process Calculations in R.” Journal of Statistical Software, 63(10), 1–23. doi: 10.18637/jss.v063.i10, https://doi.org/10.18637/jss.v063.i10.

Corresponding BibTeX entry:

  @Article{,
    title = {Parallelizing Gaussian Process Calculations in {R}},
    author = {Christopher J. Paciorek and Benjamin Lipshitz and Wei
      Zhuo and {Prabhat} and Cari G. Kaufman and Rollin C. Thomas},
    journal = {Journal of Statistical Software},
    year = {2015},
    volume = {63},
    number = {10},
    pages = {1--23},
    url = {https://doi.org/10.18637/jss.v063.i10},
    doi = {10.18637/jss.v063.i10},
  }