1. Ward-Booth P, Eppley BL, Schmelzheisen R. Maxillofacial trauma and esthetic facial reconstruction. 1st ed. Churchill Livingstone. 2003:437.
2. Chu CH, Yeung CK, Lai IA, Leung WK, Mok MY. Oral health of Chinese people with systemic sclerosis. Clin Oral Investig. 2011;15(6):931–9.
3. Greidinger EL, Flaherty KT, White B, Rosen A, Wigley FM, Wise RA. African- American race and antibodies to topoisomerase I are associated with increased severity of scleroderma lung disease. Chest. 1998;114:801–7.
4. Gilliland BC, Mannik M. Progressive systemic scleroderma. In: Isselbacher KJ, Adams RD, Braunwald E, Petersdorf RG, Wilson JD, editors. Harrison’s principles of internal medicine. New York: McGraw-Hill; 1987. pp. 1828–32.
5. Dghoughi S, El Wady W, Taleb B. Systemic sclerosis. Case report and review of literature. N Y State Dent J. 2010;76(3):30–5.