Tripathi, R., S. Gupta, S. Rai, and P. C. Mittal. 2011. “Effect of Topical Application of Methylsulfonylmethane (MSM), EDTA on Pitting Edema and Oxidative Stress in a Double Blind, Placebo-Controlled Study”. Cellular and Molecular Biology 57 (1):62-69. http://cellmolbiol.org/index.php/CMB/article/view/957.