To cite SmoothHazard in publications use:

Touraine C, Gerds TA, Joly P (2017). “SmoothHazard: An R Package for Fitting Regression Models to Interval-Censored Observations of Illness-Death Models.” Journal of Statistical Software, 79(7), 1–22. doi:10.18637/jss.v079.i07.

Corresponding BibTeX entry:

  @Article{,
    title = {{SmoothHazard}: An {R} Package for Fitting Regression
      Models to Interval-Censored Observations of Illness-Death
      Models},
    author = {C\'elia Touraine and Thomas A. Gerds and Pierre Joly},
    journal = {Journal of Statistical Software},
    year = {2017},
    volume = {79},
    number = {7},
    pages = {1--22},
    doi = {10.18637/jss.v079.i07},
  }