To cite package ‘fdarep’ in publications use:

  Kundu P, Zhou C, Chen K, Delicado P, Iao S, Chen H, Chen H, Cui M,
  Müller H (2023). _fdarep: Two-dimensional FPCA, Marginal FPCA, and
  Product FPCA for Repeated Functional Data_. R package version 0.1.0,
  <https://github.com/functionaldata/tfdarep>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fdarep: Two-dimensional FPCA, Marginal FPCA, and Product FPCA for
Repeated Functional Data},
    author = {Poorbita Kundu and Changbo Zhou and Kehui Chen and Pedro Delicado and Su I Iao and Hang Chen and Han Chen and Muqing Cui and Hans-Georg Müller},
    year = {2023},
    note = {R package version 0.1.0},
    url = {https://github.com/functionaldata/tfdarep},
  }