To cite package 'fCertificates' in publications use:

Stefan Wilhelm (2015). fCertificates: Basics of Structured Products Valuation. R package version 0.5-4.

Corresponding BibTeX entry:

  @Manual{,
    title = {fCertificates: Basics of Structured Products Valuation},
    author = {Stefan Wilhelm},
    year = {2015},
    note = {R package version 0.5-4},
  }