To cite package ‘sparsepp’ in publications use:

Popovitch G, Google Inc (2018). sparsepp: 'Rcpp' Interface to 'sparsepp'. R package version 1.22, https://github.com/dselivanov/r-sparsepp.

Corresponding BibTeX entry:

  @Manual{,
    title = {sparsepp: 'Rcpp' Interface to 'sparsepp'},
    author = {Gregory Popovitch and {Google Inc}},
    year = {2018},
    note = {R package version 1.22},
    url = {https://github.com/dselivanov/r-sparsepp},
  }