To site GenSVM in publications use:

van den Burg GJ, Groenen PJ (2016). “GenSVM: A Generalized Multiclass Support Vector Machine.” Journal of Machine Learning Research, 17(225), 1-42. https://jmlr.org/papers/v17/14-526.html.

Corresponding BibTeX entry:

  @Article{JMLR:v17:14-526,
    title = {{GenSVM}: A Generalized Multiclass Support Vector
      Machine},
    author = {Gerrit J.J. {van den Burg} and Patrick J.F. Groenen},
    journal = {Journal of Machine Learning Research},
    year = {2016},
    volume = {17},
    number = {225},
    pages = {1-42},
    url = {https://jmlr.org/papers/v17/14-526.html},
  }