To cite factorMerger in publications use:

Sitko A, Biecek P (2017). The Merging Path Plot: adaptive fusing of k-groups with likelihood-based model selection. https://arxiv.org/abs/1709.04412.

Corresponding BibTeX entry:

  @Manual{,
    title = {{The Merging Path Plot}: adaptive fusing of k-groups with
      likelihood-based model selection},
    author = {Agnieszka Sitko and Przemyslaw Biecek},
    year = {2017},
    url = {https://arxiv.org/abs/1709.04412},
  }