1. Clements PJ, Furst DE. Systemic sclerosis. Baltimore (MD): Williams & Wilkinson, 2003.
2. LeRoy EC, Black C, Fleishmajer R et al. Scleroderma (systemic sclerosis): classification, subsets and pathogenesis. J Rheumatol1988;15:202–5.
3. Hashimoto K, Niizuma K. Skin pathology by light and electron microscopy. New York: Igaku-Shoin, 1983:62–70.
4. Trotta F, Biagini G, Cenacchi G et al. Microvascular changes in progressive systemic sclerosis: immunohistochemical and ultrastructural study. Clin Exp Rheumatol1984;2:209–15.
5. Prescott RJ, Freemont AJ, Jones CJP, Hoyland J, Fielding P. Sequential dermal microvascular and perivascular changes in the development of scleroderma. J Pathol1992;166:255–63.