To cite 'sftrack' in publications use:

Boone M, Joo R, Basille M (2020). sftrack: Modern Classes for Tracking and Movement Data. R package version 0.5.2, https://mablab.org/sftrack/.

Corresponding BibTeX entry:

  @Manual{,
    title = {{sftrack}: Modern Classes for Tracking and Movement Data},
    author = {Matthew Boone and RocĂ­o Joo and Mathieu Basille},
    year = {2020},
    note = {R package version 0.5.2},
    url = {https://mablab.org/sftrack/},
  }