To cite in publications use:

Bill Venables and Kurt Hornik and Martin Maechler (2014). polynom: A Collection of Functions to Implement a Class for Univariate Polynomial Manipulations. R package version 1.3-8.

Corresponding BibTeX entry:

  @Manual{,
    title = {polynom: A Collection of Functions to Implement a Class
      for Univariate Polynomial Manipulations},
    author = {Bill Venables and Kurt Hornik and Martin Maechler},
    year = {2014},
    note = {R package version 1.3-8. S original by Bill Venables,
      packages for R by Kurt Hornik and Martin Maechler.},
    url = {http://CRAN.R-project.org/package=polynom},
  }