M. López-Ratón, M. X. Rodríguez-Álvarez, C. Cadarso-Suárez, and F. Gude-Sampedro, “OptimalCutpoints: An R Package for Selecting Optimal Cutpoints in Diagnostic Tests”, J. Stat. Soft., vol. 61, no. 8, pp. 1–36, Nov. 2014.