To cite fPortfolio in publications use:

D. Wuertz, Y. Chalabi, W. Chen and A. Ellis (2010), Portfolio Optimization with R/Rmetrics

Corresponding BibTeX entry:

  @Book{,
    title = {Portfolio Optimization with R/Rmetrics},
    author = {Diethelm Wuertz and Yohan Chalabi and William Chen and
      Andrew Ellis},
    year = {2010},
    month = {April},
    editor = {{Wuertz} and {Diethelm} and {Hanf} and {Martin}},
    publisher = {Rmetrics Association & Finance Online,
      www.rmetrics.org},
    note = {R package version 2130.80},
  }