To cite package ‘inctools’ in publications use:

  Grebe E, Welte A, McIntosh A, Bäumler P, Ongarello S (2019).
  _inctools: Incidence Estimation Tools_. R package version 1.0.15,
  <https://CRAN.R-project.org/package=inctools>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {inctools: Incidence Estimation Tools},
    author = {Eduard Grebe and Alex Welte and Avery McIntosh and Petra Bäumler and Stefano Ongarello},
    year = {2019},
    note = {R package version 1.0.15},
    url = {https://CRAN.R-project.org/package=inctools},
  }