1. Principles of Medical Statistics;Bradford-Hill,1961
2. Design and analysis of randomized clinical trials requiring prolonged observation of each patient;Peto;British Journal Cancer,1976
3. Statistical controversies in the design of clinical trials;Brown;Division of Biostatistics, Stanford University, Technical Report No. 37,1978
4. Adaptive treatment assignment methods in clinical trials;Simon;Biometrics,1977
5. Adaptive randomization in large multicenter clinical trials;Schoenfeld,1977