REFERENCES

1. D.R.Cox and D.Oakes, Analysis of Survival Data, Chapman and Hall London (1984).
2. Elandt-Johnson, R. C. and N.L. Johnson Survival Models and Data Analysis, John Wiley and Sons New York (1980).           
3. D.Collett, Modeling Survival Data in Medical Research, Chapman and Hall London (1994).
4. J R. D W Hosmer, S.Lemeshow Applied Survival Analysis; Regression Modeling of Time to Event Data. John Wiley and Sons New York 1999.
5. D G Kleinbaum , Survival Analysis: A self-Learning Text. Springer-Verlag New York 1996.
6. P. D Allison, Survival Analysis Using the SAS System: A Practical Guide, SAS Institute, Cary, NC, SAS Institute, Inc., 1995.