1. Butorphanol;Vandam;N Engl J Med,1980
2. Evaluation of nalbuphine hydrochloride;Miller;Am J Hosp Pharm,1980
3. Butorphanol: a review of its pharmacological properties and therapeutic efficacy;Heel;Drugs,1978
4. The effects of morphine and nalorphine-like drugs in nondependent and morphine-dependent chronic spinal dog;Martin;J Pharmacol Exp Ther,1976
5. Endogenous opiates: 1981;Olson;Peptides,1982