GRAVA, C.; RUFFATTI, A.; MILANESI, O.; FAVARO, M.; TONELLO, M.; CALLIGARO, A.; DEL ROSS, T.; TODESCO, S. Isolated congenital heart block in undifferentiated connective tissue disease and in primary Sjögren’s syndrome: a clinical study of 81 pregnancies in 41 patients. Reumatismo, v. 57, n. 3, p. 180-186, 11 Apr. 2005.