“Critical Finger Ischemia and Myocardial Fibrosis Development After Sudden Interruption of Sildenafil Treatment in a Systemic Sclerosis Patient”. Reumatismo 68, no. 2 (September 9, 2016): 109–111. Accessed April 18, 2025. https://www.reumatismo.org/reuma/article/view/889.