1. Opioids,2009
2. Recognition, assessment, and management of pain in birds,2016
3. Analgesic effects of carprofen and liposome-encapsulated butorphanol tartrate in Hispaniolan parrots (Amazona ventralis) with experimentally induced arthritis,2009
4. Serum concentrations and analgesic effects of liposome-encapsulated and standard butorphanol tartrate in parrots,2006
5. Analgesic effects of butorphanol and buprenorphine in conscious African grey parrots (Psittacus erithacus and Psittacus erithacus timneh),1999