1. Weatherall DJ, Ledingham JGG, Warrell DA (1996) Oxford Textbook of Medicine, 3rd edn. Oxford University Press, Oxford
2. Fauci AS, Braunwald E, Isselbacker KJ et al (????) Harrison’s Principles of Internal Medicine, 14th edn. McGraw-Hill, New York
3. Wiedemann HP, Matthay RA (1989) Pulmonary manifestations of collagen vascular diseases. Clin Chest Med 10:677–722
4. Owens GR, Follansbee WP (1987) Cardiopulmonary manifestations of systemic sclerosis. Chest 91:118–127
5. Minai OM, Dweik RA, Arroliga AC (1998) Manifestations of scleroderma pulmonary disease. Clin Chest Med 19:713–731