REFERENCES
- David , H. A. and Moeschberger , M. L. 1978 . The Theory of Competing Risks. New York : Macmillan. . Griffin Monograph No. 39
- Prentice , R. L. and Breslow , N. E. 1978 . The analysis of failure times in the presence of competing risks . Biometrics , 34 : 541 – 554 .