To cite package ‘ssr’ in publications use:

Garcia-Ceja E (2019). ssr: Semi-Supervised Regression Methods. R package version 0.1.1, https://github.com/enriquegit/ssr.

Corresponding BibTeX entry:

  @Manual{,
    title = {ssr: Semi-Supervised Regression Methods},
    author = {Enrique Garcia-Ceja},
    year = {2019},
    note = {R package version 0.1.1},
    url = {https://github.com/enriquegit/ssr},
  }