Riccardi, M., Chialà, A., Iannone, F., Grattagliano, V., Covelli, M., & Lapadula, G. (2007). Treatment of digital ulcers in systemtic sclerosis with endothelin-1 receptor antagonist (bosentan). Reumatismo, 59(2), 135–139. https://doi.org/10.4081/reumatismo.2007.135