To cite the FRGEpistasis package in publications use:

  Futao Zhang, Eric Boerwinkle and Momiao Xiong. Epistasis Analysis for
  Quantitative Traits by Functional Regression Model. Genome Research ,
  (2014).

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Epistasis Analysis for Quantitative Traits by Functional Regression Model},
    author = {Futao Zhang and Eric Boerwinkle and Momiao Xiong},
    journal = {Genome Research},
    year = {2014},
  }