1. Regression models and life tables (with discussion);Cox;J R Stat Soc B,1972
2. Use of concomitant variables and incomplete survival information in the estimation of an exponential survival parameter;Zippin;Biometrics,1966
3. Evaluation of survival data and two new rank order statistics arising in its consideration;Mantel;Cancer Chemother Rep,1966
4. Non-parametric estimation from incomplete observation;Kaplan;J Am Stat Assn,1958
5. Evaluating differences in survival between two groups of patients;Hankey;J Chron Dis,1971