@book{14986,
	author = {Kalbfleisch, J. D. and Prentice, Ross L. and Prentice, Ross L. ; jt. auth.},
	title = {The statistical analysis of failure time data /},
	publisher = {John Wiley},
	year = {1980},
	series = {Wiley series in Probability and Mathematical Statistics},
	address = {New York:,}
}