D. G. Ritter

Functional assessment of the Fontan operation: combined M-mode, two-dimensional and Doppler echocardiographic studies.

D. G. Ritter, J. Seward, D. Hagler, 1984, Journal of the American College of Cardiology.

Dextrocardia: Angiocardiographic study and classification

D. G. Ritter, O. W. Kincaid, U. Squarcia, 1973 .

Noninvasive assessment of pulmonary valve stenosis, aortic valve stenosis and coarctation of the aorta in critically ill neonates.

James B. Seward, Donald J. Hagler, A. Tajik, 1986, The American journal of cardiology.