To cite textstem in publications, please use:

Rinker, T. W. (2018). textstem: Tools for stemming and lemmatizing text version 0.1.5. Buffalo, New York. http://github.com/trinker/textstem

Corresponding BibTeX entry:

  @Manual{,
    title = {{textstem}: Tools for stemming and lemmatizing text},
    author = {Tyler W. Rinker},
    address = {Buffalo, New York},
    note = {version 0.1.5},
    year = {2018},
    url = {http://github.com/trinker/textstem},
  }