To cite DiSSMod in publications use:

Lee SK, Yang K, Azzalini A, Kim H (2019). DiSSMod: An R package for fitting sample selection model for discrete response variables. Konkuk University, Universit'a di Padova, Seoul, Republic of Korea, Padova, Italia.

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},
  }