Bernero, E., A. Sulli, G. Ferrari, F. Ravera, C. Pizzorni, B. Ruaro, G. Zampogna, E. Alessandri, and M. Cutolo. “Prospective Capillaroscopy-Based Study on Transition from Primary to Secondary Raynaud’s Phenomenon: Preliminary Results”. Reumatismo 65, no. 4 (October 31, 2013): 186-191. Accessed November 28, 2020. https://reumatismo.org/index.php/reuma/article/view/reumatismo.2013.186.