S Hagen-Ansert

Guidelines for cardiac sonographer education: report of the American Society of Echocardiography Sonographer Education and Training Committee.

J Kisslo, P Harrigan, O L Kwan, 1992, Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography.

Three‐dimensional echocardiographic evaluation of fetal heart anatomy and function: acquisition, analysis, and display.

T. Nelson, M. Sklansky, D. Pretorius, 1996 .