Collett, D., 1952- Modelling survival data in medical research D. Collett. - London: Chapman & Hall, 1994. - 347 pages : illustrations ; 24 cm. - Texts in statistical science. . p. 333-340. ISBN: 0412448904 RM149.20 Subjects--Topical Terms: Survival analysis--MethodsProportional Hazards Models