To cite DiSSMod in publications use:

Sang Kyu Lee, Kexuan Yang, Adelchi Azzalini and Hyoung-Moon Kim (2019). DiSSMod: An R package for fitting sample selection model for discrete response variables.

Corresponding BibTeX entry:

  @Manual{,
    title = {{DiSSMod}: An {R} package for fitting sample selection
      model for discrete response variables},
    author = {Sang Kyu Lee and Kexuan Yang and Adelchi Azzalini and
      Hyoung-Moon Kim},
    organization = {{Konkuk University, Universit`a di Padova}},
    address = {{Seoul, Republic of Korea, Padova, Italia}},
    year = {2019},
  }