To cite grpregOverlap in publications use:

Zeng, Y., and Breheny, P. (2016). Overlapping Group Logistic Regression with Applications to Genetic Pathway Selection. Cancer Informatics, 15, 179-187.

Corresponding BibTeX entry:

  @Article{,
    author = {Yaohui Zeng and Patrick Breheny},
    title = {Overlapping Group Logistic Regression with Applications to
      Genetic Pathway Selection},
    journal = {Cancer Informatics},
    year = {2016},
    volume = {15},
    pages = {179-187},
    number = {1},
  }