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, vol. 65, no. 4, Oct. 2013, pp. 186-91, doi:10.4081/reumatismo.2013.186.