To cite package ‘traj’ in publications use:

  Sylvestre M, Vatnik D (2024). _traj: Trajectory Analysis_. R package
  version 1.3.1, <https://github.com/tchouangue/traj>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {traj: Trajectory Analysis},
    author = {Marie-Pierre Sylvestre and Dan Vatnik},
    year = {2024},
    note = {R package version 1.3.1},
    url = {https://github.com/tchouangue/traj},
  }