To cite luca in publications use:

Shin J, McNeney B, Graham J (2007). “Case-Control Inference of Interaction Between Genetic and Nongenetic Risk Factors Under Assumptions on Their Distribution.” Statistical Applications in Genetics and Molecular Biology, 6(1), Article 13.

Corresponding BibTeX entry:

  @Article{,
    title = {Case-Control Inference of Interaction Between Genetic and
      Nongenetic Risk Factors Under Assumptions on Their
      Distribution.},
    author = {J.-H. Shin and B. McNeney and J. Graham},
    journal = {Statistical Applications in Genetics and Molecular
      Biology},
    volume = {6(1)},
    year = {2007},
    pages = {Article 13},
  }