References (Cox Proportional Hazard Regression)

1. Cox D R (1972b) Regression models in life tables (with discussion). J. Roy. Statist. Soc, Ser. B 34 187-220.

2. Kalbfkisch J D and Prentice R L (1980). The Statistical Analysis of Failure Time Data. Wiley-Interscience.

3. Gross A J and Clark V A (1975). Survival Distributions: Reliability Applications in the Biomedical Sciences. John Wiley & Sons, Inc.