1. Atrioventricular septal defect in prenatal life;Machado;Br Heart J,1988
2. Calculating confidence intervals for proportions and their differences. In: Gardner MJ, Altman DG, editors. Statistics With Confidence. 1st ed. London: British Medical Journal. 1989:28–33.
3. Regression models and life-tables;Cox;J Royal Stat Soc,1972
4. Jones KL. Miscellaneous associations. Smith’s Recognizable Patterns of Human Malformation. 5th ed. Philadelphia: W.B. Saunders, 1997:668–70.
5. Prenatal diagnosis of atrioventricular canal malformations with up-to-date echocardiographic technology;Gembruch;Am Heart J,1991