1. The Criteria Committee of the New York Heart Association,1973
2. Clinical Scalar Electrocardiography.;Lipman,1972
3. Estimation of left atrial size using ultrasound;Hirata;Am Heart J,1969
4. Dimensions and volumes of left atrium and ventricle determined by single beam echocardiography;Tencate;Br Heart J,1974
5. Clinical applications of echocardiography, in infants and children;Lundstrom;II. Estimation of aortic root diameter and left atrial size. A comparison between echocardiography and anglocardiography. Acta Paediatr Scand,1974