@article{LueckeForster2019,
  title={k-means as a variational EM approximation of Gaussian mixture models},
  author={L{\"u}cke, J{\"o}rg and Forster, Dennis},
  journal={Pattern Recognition Letters},
  publisher={Elsevier},
  year={2019},
  month={07},
  volume={125},
  url={https://doi.org/10.1016/j.patrec.2019.04.001},
  pages={349-356},
  doi={10.1016/j.patrec.2019.04.001}
}