@article{her97val,
  title = {Validity and Efficiency of Approximation Methods for Tied Survival Times in {{Cox}} Regression},
  volume = {53},
  journal = {Biometrics},
  author = {{Hertz-Picciotto}, Irva and Rockhill, Beverly},
  year = {1997},
  keywords = {simulation-setup,cox-model,breslow-approximation,discrete-failure-times,efron-approximation,tied-failure-times},
  pages = {1151-1156},
  citeulike-article-id = {13264290},
  posted-at = {2014-07-14 14:09:32},
  priority = {0}
}

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