To cite survPresmooth in publications use:

Ignacio Lopez-de-Ullibarri, M. Amalia Jacome (2013). survPresmooth: An R Package for Presmoothed Estimation in Survival Analysis. Journal of Statistical Software, 54(11), 1-26. URL http://www.jstatsoft.org/v54/i11/.

Corresponding BibTeX entry:

  @Article{,
    title = {{survPresmooth}: An {R} Package for Presmoothed Estimation
      in Survival Analysis},
    author = {Ignacio L{\'o}pez-de-Ullibarri and M. Amalia J{\'a}come},
    journal = {Journal of Statistical Software},
    year = {2013},
    volume = {54},
    number = {11},
    pages = {1--26},
    url = {http://www.jstatsoft.org/v54/i11/},
  }