Grypiotis, P., A. Ruffatti, F. Cozzi, R. Sinico, M. Tonello, A. Radice, M. Favaro, and S. Todesco. “Prevalence and Clinical Significance of Cathepsin G Antibodies in Systemic Sclerosis”. Reumatismo, vol. 55, no. 4, Dec. 2003, pp. 256-62, doi:10.4081/reumatismo.2003.256.