Vangala Subrahmanyam, Alfred P. Tonelli, David G. Walters, Brian G. Lake, Anthony B. Renwick, Roger J. Price, Philip J. Young,
Identification of cytochrome P-450 isoforms responsible for cis-tramadol metabolism in human liver microsomes. Drug Metabolism and Disposition. ,vol. 29, pp. 1146- 1155 ,(2001)