1. Analgesic combinations;Beaver,1975
2. Aspirin and acetaminophen as constituents of analgesic combinations;Beaver;Arch. Intern. Med.,1981
3. Measurement of analgesic efficacy in man;Beaver,1983
4. Methodological considerations in the evaluation of analgesic combinations: acetaminophen (paracetamol) and hydrocodeine in post-partum pain;Beaver;Br. J. Clin. Pharmacol.,1980
5. Are all significant P values created equal?;Browner;JAMA,1987