@misc{W2057964179,
  author = {Bengt Muthén and Kerby Shedden},
  title = {Finite Mixture Modeling with Mixture Outcomes Using the EM Algorithm},
  year = {1999},
  howpublished = {Biometrics},
  doi = {https://doi.org/10.1111/j.0006-341x.1999.00463.x}
}