To cite RRF in publications use:

G. Izmirlian(2004). Interim Analysis Planning using the PwrGSD package. NCI Div. of Cancer Prevention Technical Report.

G. Izmirlian (2014). Estimation of the relative risk following group sequential procedure based upon the weighted log-rank statistic. Statistics and its Interface 7(1): 27-42.

Corresponding BibTeX entries:

  @TechReport{,
    title = {Interim Analysis Planning using the PwrGSD package},
    author = {Grant Izmirlian},
    institution = {NCI Div. of Cancer Prevention},
    year = {2004},
  }

  @Article{,
    title = {Estimation of the relative risk following group sequential
      procedure based upon the weighted log-rank statistic},
    author = {Grant Izmirlian},
    journal = {Statistics and its Interface},
    year = {2014},
    volume = {7},
    number = {1},
    pages = {27-42},
  }