To cite package ‘fdaconcur’ in publications use:

  Iao S, Bhattacharjee S, Chen Y, Zhu C, Chen H, Zhou Y, Gajardo Á,
  Kundu P, Zhou H, Müller H (2024). _fdaconcur: Concurrent Regression
  and History Index Models for Functional Data_. R package version
  0.1.3, <https://CRAN.R-project.org/package=fdaconcur>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fdaconcur: Concurrent Regression and History Index Models for Functional
Data},
    author = {Su I Iao and Satarupa Bhattacharjee and Yaqing Chen and Changbo Zhu and Han Chen and Yidong Zhou and Álvaro Gajardo and Poorbita Kundu and Hang Zhou and Hans-Georg Müller},
    year = {2024},
    note = {R package version 0.1.3},
    url = {https://CRAN.R-project.org/package=fdaconcur},
  }