1. d-Penicillamine therapy in progressive systemic sclerosis (scleroderma): a retrospective analysis;Steen;Ann Intern Med,1982
2. A modified scleroderma skin scoring method;Kahaleh;Clin Exp Rheumatol,1986
3. Skin thickness and collagen content in progressive systemic sclerosis and localized scleroderma;Rodnan;Arthritis Rheum,1979
4. Skin elasticity measured by dynamic admittance: a new technique for mechanical measurements in patients with scleroderma;Bjerring;Acta Derm Venereol Suppl (Stockh),1985
5. Direct quantitation of skin elasticity in systemic sclerosis;Ballou;J Rheumatol,1990