To cite package ‘FCtools’ in publications use:

  Yu J, Billaud C (2026). _FCtools: Functional Connectivity Tools_. R
  package version 2.3.1,
  <https://github.com/cogbrainhealthlab/fctools>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {FCtools: Functional Connectivity Tools},
    author = {Junhong Yu and Charly Billaud},
    year = {2026},
    note = {R package version 2.3.1},
    url = {https://github.com/cogbrainhealthlab/fctools},
  }