@article{JMLR:v20:18-873,
  author  = {Mauro Maggioni and James M. Murphy},
  title   = {Learning by Unsupervised Nonlinear Diffusion},
  journal = {Journal of Machine Learning Research},
  year    = {2019},
  volume  = {20},
  number  = {160},
  pages   = {1--56},
  url     = {http://jmlr.org/papers/v20/18-873.html}
}