@inbook{SraR2013,
  title = {Tractable large-scale optimization in machine learning},
  booktitle = {Tractability: Practical Approaches to Hard Problems},
  pages = {202--230},
  chapter = {7},
  editors = {Bordeaux, L., Hamadi , Y., Kohli, P. and Mateescu, R. },
  publisher = {Cambridge University Press },
  year = {2013},
  slug = {srar2012},
  author = {Sra, S.}
}