To cite package ‘sdafilter’ in publications use:

  Du L (2020). _sdafilter: Symmetrized Data Aggregation_. R package
  version 1.0.0, <https://CRAN.R-project.org/package=sdafilter>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {sdafilter: Symmetrized Data Aggregation},
    author = {Lilun Du},
    year = {2020},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=sdafilter},
  }