Erre, G.L., and G. Passiu. “Antioxidant Effect of Iloprost: Current Knowledge and Therapeutic Implications for Systemic Sclerosis”. Reumatismo 61, no. 2 (1): 90-97. Accessed June 12, 2021. https://www.reumatismo.org/index.php/reuma/article/view/reumatismo.2009.90.