To cite vennLasso in publications use:

Huling, J. D., Yu, M., Liang, M., & Smith, M. (2018) Risk prediction for heterogeneous populations with application to hospital admission prediction, Biometrics, 75(2), pages 557-665. https://doi.org/10.1111/biom.12769.

Corresponding BibTeX entry:

  @Article{,
    author = {Jared Huling and Menggang Yu and Muxian Liang and Maureen
      Smith},
    title = {Risk prediction for heterogeneous populations with
      application to hospital admission prediction},
    journal = {Biometrics},
    year = {2018},
    volume = {75},
    issue = {2},
    pages = {1122},
    doi = {10.1111/biom.12769},
    url = {https://doi.org/10.1111/biom.12769},
  }