@article{understandingmachinelearneddensity,
  title = {Understanding Machine-learned Density Functionals},
  author = {Li Li and John C. Snyder and Isabelle M. Pelaschier and Jessica Huang and Uma-Naresh Niranjan and Paul Duncan and Matthias Rupp and Klaus-Robert Müller and Kieron Burke},
  year = {2014},
  eprint = {1404.1333},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1404.1333v2},
}