To cite package ‘stfit’ in publications use:

  Zhu W (2022). _stfit: Spatio-Temporal Functional Imputation Tool_. R
  package version 0.99.9, <https://github.com/mingsnu/stfit>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {stfit: Spatio-Temporal Functional Imputation Tool},
    author = {Weicheng Zhu},
    year = {2022},
    note = {R package version 0.99.9},
    url = {https://github.com/mingsnu/stfit},
  }