1. Altman DG. Practical Statistics for Medical Research. Chapman and Hall, 2015.
2. Armitage P, Berry G, Mathews J. Statistical Methods in Medical Research, ed 4th. Malden MA, Blackwell Publishing, 2002.
3. Breslow NE. Comparison of survival curves; in Buyse B, Staquet M, Sylvester R (eds): The Practice of Clinical Trials in Cancer. Oxford, Oxford University Press, 1982.
4. Brown BW, Hollander M. Statistics: A Biomedical Introduction. Wiley, 2009.
5. Fisher L, Van Belle G, Heagerty PL, Lumley TS. Biostatistics—A Methodology for the Health Sciences. New York, John Wiley and Sons, 2004.