Constructing a Control Group Using Multivariate Matched Sampling Methods That Incorporate the Propensity Score. Rosenbaum, P. R. & Rubin, D. B. Am Statistician, 39:33-38, 1985.
bibtex   
@article{ros85con,
  title = {Constructing a Control Group Using Multivariate Matched Sampling Methods That Incorporate the Propensity Score},
  volume = {39},
  journal = {Am Statistician},
  author = {Rosenbaum, Paul R. and Rubin, Donald B.},
  year = {1985},
  keywords = {confounding,bias,matching,propensity-score},
  pages = {33-38},
  citeulike-article-id = {13264754},
  posted-at = {2014-07-14 14:09:41},
  priority = {0}
}

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