To cite jmcm in publications use:

  Pan J, Pan Y (2017). “jmcm: An R Package for Joint Mean-Covariance
  Modeling of Longitudinal Data.” _Journal of Statistical Software_,
  *82*(9), 1-29. doi:10.18637/jss.v082.i09
  <https://doi.org/10.18637/jss.v082.i09>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{jmcm}: An {R} Package for Joint Mean-Covariance Modeling of Longitudinal Data},
    author = {Jianxin Pan and Yi Pan},
    journal = {Journal of Statistical Software},
    year = {2017},
    volume = {82},
    number = {9},
    pages = {1--29},
    doi = {10.18637/jss.v082.i09},
  }