@article{dempster1977,
  title={Maximum Likelihood from Incomplete Data Via the EM Algorithm},
  author={A. P. Dempster and N. M. Laird and Donald B. Rubin},
  year={1977},
  journal={Journal of the Royal Statistical Society Series B (Statistical Methodology)},
  doi={10.1111/j.2517-6161.1977.tb01600.x},
  url={https://doi.org/10.1111/j.2517-6161.1977.tb01600.x}
}