To cite OptimalCutpoints in publications use:

López-Ratón M, Rodríguez-Álvarez MX, Suárez CC, Sampedro FG (2014). “OptimalCutpoints: An R Package for Selecting Optimal Cutpoints in Diagnostic Tests.” Journal of Statistical Software, 61(8), 1–36. doi:10.18637/jss.v061.i08.

Corresponding BibTeX entry:

  @Article{,
    title = {{OptimalCutpoints}: An {R} Package for Selecting Optimal
      Cutpoints in Diagnostic Tests},
    author = {M{\'o}nica L{\'o}pez-Rat{\'o}n and Mar{\'i}a Xos{\'e}
      Rodr{\'i}guez-{\'A}lvarez and Carmen Cadarso Su{\'a}rez and
      Francisco Gude Sampedro},
    journal = {Journal of Statistical Software},
    year = {2014},
    volume = {61},
    number = {8},
    pages = {1--36},
    doi = {10.18637/jss.v061.i08},
  }