Efficacy and safety of avocado/soybean unsaponifiables in the treatment of symptomatic osteoarthritis of the knee and hip. A prospective, multicenter, three-month, randomized, double-blind, placebo-controlled trial.

Blotman F, Maheu E, Wulwik A, Caspard H, Lopez A.
Rev Rhum Engl Ed. 1997 Dec;64(12):825-34

https://www.ncbi.nlm.nih.gov/pubmed/9476272