1. Aalbers R, Groen H, Postma DS, Van Der Mark TW, Wouda AA, Reig RP, Kallenberg CGM (1989) Pulmonary function in patients presenting with Raynaud's phenomenon without an underlying connective tissue disease. A prospective, longitudinal study. J Rheumatol 16: 36?41
2. Barnett AJ (1974) Scleroderma (progressive systemic sclerosis), Charles C. Thomas, Springfield, pp 71?93
3. Bennet R, Bluestone R, Holt PL (1971) Survival in scleroderma. Ann Rheum Dis 30: 581?588
4. Fitzgerald OM, Bongiovanni G, Hess EV, Merhar G, Fernandez-Ulloa M, Spencer-Green G (1987) Esophageal motility studies in patients with Raynaud's phenomenon. J Rheumatol 14: 273?277
5. Fitzgerald OM, Hess EV, O'Connor GT, Spencer-Green G (1988) Prospective study of the evolution of Raynaud's phenomenon. Am J Med 84: 718?726