Catarsi, E., M. Doveri, and A. Tavoni. “Bosentan and Sildenafil: Successful Treatment in a Sclerodermic Patient With Refractory Ulcers”. Reumatismo 65, no. 2 (May 27, 2013): 79–81. Accessed December 4, 2024. https://www.reumatismo.org/reuma/article/view/reumatismo.2013.79.