To cite XPolaris in publications use:

Moro Rosso L, de Borja Reis A, Correndo A, Ciampitti I (2021). “XPolaris: an R-package to retrieve United States soil data at 30-meter resolution.” BMC Research Notes, 14(1), 327. doi: 10.1186/s13104-021-05729-y, https://doi.org/10.1186/s13104-021-05729-y.

Corresponding BibTeX entry:

  @Article{,
    title = {XPolaris: an R-package to retrieve United States soil data
      at 30-meter resolution.},
    author = {Luiz H. {Moro Rosso} and Andre F. {de Borja Reis} and
      Adrian A. Correndo and Ignacio A. Ciampitti},
    journal = {BMC Research Notes},
    year = {2021},
    volume = {14},
    number = {1},
    pages = {327},
    doi = {10.1186/s13104-021-05729-y},
    url = {https://doi.org/10.1186/s13104-021-05729-y},
  }