Munuswamy K, Alpert MA, Martin RH, Whiting RB, Mechlin NJ (1983). "Sensitivity and specificity of commonly used electrocardiographic criteria for left atrial enlargement determined by m-mode echocardiography". Am J Cardiol. 53 (6): 829–832. doi:10.1016/0002-9149(84)90413-2. PMID6230922.
Munuswamy K, Alpert MA, Martin RH, Whiting RB, Mechlin NJ (1983). "Sensitivity and specificity of commonly used electrocardiographic criteria for left atrial enlargement determined by m-mode echocardiography". Am J Cardiol. 53 (6): 829–832. doi:10.1016/0002-9149(84)90413-2. PMID6230922.