To cite cat.dt in publications use:

Rodriguez-Cuadrado J, Delgado-Gomez D, Laria JC, Rodriguez-Cuadrado S (2020). “Merged Tree-CAT: A fast method for building precise computerized adaptive tests based on decision trees.” Expert Systems with Applications, 143, 113066.

Corresponding BibTeX entry:

  @Article{,
    title = {Merged Tree-CAT: A fast method for building precise
      computerized adaptive tests based on decision trees},
    author = {Javier Rodriguez-Cuadrado and David Delgado-Gomez and
      Juan C. Laria and Sara Rodriguez-Cuadrado},
    journal = {Expert Systems with Applications},
    year = {2020},
    volume = {143},
    pages = {113066},
    publisher = {Elsevier},
  }