@article{stochasticbackwardeuleranimplicit,
  title = {Stochastic Backward Euler: An Implicit Gradient Descent Algorithm for $k$-means Clustering},
  author = {Penghang Yin and Minh Pham and Adam Oberman and Stanley Osher},
  year = {2017},
  eprint = {1710.07746},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1710.07746v3},
}