- Effects of an oral administration of glucosamine-chondroitin-quercetin glucoside on the synovial fluid properties in patients with osteoarthritis and rheumatoid arthritis.

http://www.ncbi.nlm.nih.gov/pubmed/19202302

- Effects of N-acetyl glucosamine and chondroitin sulfate supplementation on knee pain and self-reported knee function in middle-aged and older Japanese adults: a randomized, double-blind, placebo-controlled trial.

http://www.ncbi.nlm.nih.gov/pubmed/26178634

- Chondroitin sulfate and/or glucosamine hydrochloride for Kashin-Beck disease: a cluster-randomized, placebo-controlled study.

http://www.ncbi.nlm.nih.gov/pubmed/22469850?dopt=Abstract

- Effect of a dietary supplement containing glucosamine hydrochloride, chondroitin sulfate and quercetin glycosides on symptomatic knee osteoarthritis: a randomized, double-blind, placebo-controlled study.

http://www.ncbi.nlm.nih.gov/pubmed/21969261?dopt=Abstract

- The effects of glucosamine and chondroitin sulfate on osteoarthritis of the TMJ: a preliminary report of 50 patients.

http://www.ncbi.nlm.nih.gov/pubmed/10029750?dopt=Abstract

- Chondroitin sulfate and/or glucosamine hydrochloride for Kashin-Beck disease: a cluster-randomized, placebo-controlled study.

http://www.ncbi.nlm.nih.gov/pubmed/22469850?dopt=Abstract