@article{JMLR:v17:15-012,
  author  = {Stephan Cl{{\'e}}men{\c{c}}on and Igor Colin and Aur{{\'e}}lien Bellet},
  title   = {Scaling-up Empirical Risk Minimization: Optimization of Incomplete $U$-statistics},
  journal = {Journal of Machine Learning Research},
  year    = {2016},
  volume  = {17},
  number  = {76},
  pages   = {1--36},
  url     = {http://jmlr.org/papers/v17/15-012.html}
}