To cite the current, hierarchical ctsem use:

Driver CC, Voelkle MC (2018). “Hierarchical Bayesian Continuous Time Dynamic Modeling.” Psychological Methods, 23(4), 774-799. doi:10.1037/met0000168.

To cite the original ctsem use:

Driver CC, Oud JHL, Voelkle MC (2017). “Continuous Time Structural Equation Modeling with R Package ctsem.” Journal of Statistical Software, 77(5), 1–35. doi:10.18637/jss.v077.i05.

Corresponding BibTeX entries:

  @Article{,
    title = {Hierarchical {{Bayesian}} Continuous Time Dynamic
      Modeling.},
    author = {Charles C. Driver and Manuel C. Voelkle},
    journal = {Psychological Methods},
    year = {2018},
    volume = {23},
    number = {4},
    pages = {774-799},
    doi = {10.1037/met0000168},
  }

  @Article{,
    title = {Continuous Time Structural Equation Modeling with {R}
      Package {ctsem}},
    author = {Charles C. Driver and Johan H. L. Oud and Manuel C.
      Voelkle},
    journal = {Journal of Statistical Software},
    year = {2017},
    volume = {77},
    number = {5},
    pages = {1--35},
    doi = {10.18637/jss.v077.i05},
  }