1. Serum morphine concentration after oral administration of diamorphine hydrochloride and morphine sulfate;Aherne;Br. J. Clin. Pharmacol,1979
2. Mild analgesics: A review of their clinical pharmacology;Beaver;Am. J. Med. Sci,1965
3. Comparison of analgesic effects of morphine sulfate, hydroxyzine and their combination in patients with postoperative pain;Beaver,1967
4. A clinical comparison of the analgesic effects of methadone and morphine administered intramuscularly, and of orally and parenterally administered methadone;Beaver;Clin. Pharmacol. Ther,1967
5. Management of cancer pain with parenteral medication;Beaver;J.A.M.A,1981