To cite JSM in publications use:

Xu C, Hadjipantelis PZ, Wang J (2020). “Semi-Parametric Joint Modeling of Survival and Longitudinal Data: The R Package JSM.” Journal of Statistical Software, 93(2), 1–29. doi: 10.18637/jss.v093.i02.

Corresponding BibTeX entry:

  @Article{,
    title = {Semi-Parametric Joint Modeling of Survival and
      Longitudinal Data: The {R} Package {JSM}},
    author = {Cong Xu and Pantelis Z. Hadjipantelis and Jane-Ling
      Wang},
    journal = {Journal of Statistical Software},
    year = {2020},
    volume = {93},
    number = {2},
    pages = {1--29},
    doi = {10.18637/jss.v093.i02},
  }