@incollection{NIPS2006_848,
 title = {Conditional Random Sampling: A Sketch-based Sampling Technique for Sparse Data},
 author = {Ping Li and Kenneth W. Church and Trevor J. Hastie},
 booktitle = {Advances in Neural Information Processing Systems 19},
 editor = {B. Sch\"{o}lkopf and J. Platt and T. Hoffman},
 publisher = {MIT Press},
 address = {Cambridge, MA},
 pages = {873--880},
 year = {2007}
}