1. Principles of Medical Statistics. 7th edn. The Lancet Limited: London, 1961.
2. The European Agency for the Evaluation of Medicinal Products. ICH E9 - Statistical Principles for Clinical Trials: Note for guidance on statistical principles for clinical trials. CPMP/ICH/363/96, Step 5, 1998.
3. General design issues in efficacy, equivalency and superiority trials
4. Inference and missing data