March 01, 1987 article Approximately Optimal One-Parameter Boundaries for Group Sequential Trials Biometrics DOI: 10.2307/2531959 OpenAlex Authors 0 Author list not loaded yet. Cited by 1 stored of 342 Search Sort Most cited Newest Oldest Patent citations Title Any typearticle review book-chapter conference-paper preprint dissertation book dataset other Any fieldAgricultural and Biological Sciences Arts and Humanities Biochemistry, Genetics and Molecular Biology Business, Management and Accounting Chemical Engineering Chemistry Computer Science Decision Sciences Dentistry Earth and Planetary Sciences Economics, Econometrics and Finance Energy Engineering Environmental Science Health Professions Immunology and Microbiology Materials Science Mathematics Medicine Neuroscience Nursing Pharmacology, Toxicology and Pharmaceutics Physics and Astronomy Psychology Social Sciences Veterinary Open access When randomization is not random: Allocation bias in small sample, group sequential randomized clinical trials 2026 Statistical Methods in Medical Research article Mathematics Statistical Methods in Clinical Trials Open access 1 citations 1 result References 0