To cite nVennR in publications use:

Perez-Silva J, Araujo-Voces M, Quesada V (2018). “nVenn: generalized, quasi-proportional Venn and Euler diagrams.” Bioinformatics, 34(13), 2322–2324. https://doi.org/10.1093/bioinformatics/bty109.

Corresponding BibTeX entry:

  @Article{,
    title = {nVenn: generalized, quasi-proportional Venn and Euler
      diagrams},
    author = {Jose G. Perez-Silva and Miguel Araujo-Voces and Victor
      Quesada},
    journal = {Bioinformatics},
    year = {2018},
    volume = {34},
    number = {13},
    pages = {2322–2324},
    url = {https://doi.org/10.1093/bioinformatics/bty109},
  }