To cite covsim in publications use:

Grønneberg S, Foldnes N (2017). “Covariance Model Simulation Using Regular Vines.” Psychometrika, 82(4). https://doi.org/10.1007/s11336-017-9569-6.

Corresponding BibTeX entry:

  @Article{,
    title = {Covariance Model Simulation Using Regular Vines},
    author = {Steffen Grønneberg and Njål Foldnes},
    journal = {Psychometrika},
    year = {2017},
    volume = {82},
    number = {4},
    url = {https://doi.org/10.1007/s11336-017-9569-6},
  }