To cite package geosptdb in publications use:

Melo C, Melo O, Melo S (2022). Spatio-Temporal Radial Basis Functions with Distance-Based Methods (Optimization, Prediction and Cross Validation). R package version 1.0-0, https://CRAN.R-project.org/package=geosptdb.

Corresponding BibTeX entry:

  @Manual{,
    title = {Spatio-Temporal Radial Basis Functions with Distance-Based
      Methods (Optimization, Prediction and Cross Validation)},
    author = {C.E. Melo and O.O. Melo and S.E. Melo},
    year = {2022},
    url = {https://CRAN.R-project.org/package=geosptdb},
    note = {R package version 1.0-0},
  }