To cite sievePH in publications use:

Michal Juraska (2019). sievePH: Sieve Analysis Methods for Proportional Hazards Models. R package version 1.0.0.

Corresponding BibTeX entry:

  @Manual{,
    title = {sievePH: Sieve Analysis Methods for Proportional Hazards
      Models},
    author = {Michal Juraska},
    year = {2019},
    note = {R package version 1.0.0},
  }