To cite corr2D in publications use:

Robert Geitner, Robby Fritzsch, Juergen Popp, Thomas W. Bocklitz (2018). corr2D - Implementation of Two-Dimensional Correlation Analysis in R. Journal of Statistical Software. URL https://arxiv.org/abs/1808.00685.

Corresponding BibTeX entry:

  @Article{,
    title = {{corr2D} - Implementation of Two-Dimensional Correlation
      Analysis in R},
    author = {Robert Geitner and Robby Fritzsch and Juergen Popp and
      Thomas W. Bocklitz},
    journal = {Journal of Statistical Software},
    year = {2018},
    url = {https://arxiv.org/abs/1808.00685},
  }