To cite the mixcat package in publications use:

Papageorgiou G, Hinde J (2012). “Multivariate generalized linear mixed models with semi-nonparametric and smooth nonparametric random effects densities.” Statistics and Computing, 22, 79–92. doi:10.1007/s11222-010-9207-y. https://doi.org/10.1007/s11222-010-9207-y.

Corresponding BibTeX entry:

  @Article{,
    title = {Multivariate generalized linear mixed models with
      semi-nonparametric and smooth nonparametric random effects
      densities},
    author = {Georgios Papageorgiou and John Hinde},
    journal = {Statistics and Computing},
    year = {2012},
    volume = {22},
    pages = {79--92},
    doi = {10.1007/s11222-010-9207-y},
    url = {https://doi.org/10.1007/s11222-010-9207-y},
  }