Lari 1985.

Methods	"Epidural buprenorphine versus morphine in the bone cancer pain".
Participants	"With regard to the drugs used, patients were divided (Fig. 1) into two groups, sufficiently homogeneous for number, age, sex, and topography of the neoplastic lesion, treated with morphine and buprenorphine at doses respectively of 0.07 mg/kg and 4 mcg/kg every 12 hours." (Google translate on 24 July 2014).
Interventions	See cell above.
Outcomes	Pain intensity, side effects.
Notes	The study is published in Italian and translation of the article has revealed no mention about allocation to treatment beyond the description of the study outlined in the "Participants" section 3 cells above. It is thus uncertain whether it was a randomised controlled trial.