K. Munuswamy et al., Sensitivity and specificity of commonly used electrocardiographic criteria for left atrial enlargement determined by M-mode echocardiography., in Am J Cardiol, vol. 53, n. 6, marzo 1984, pp. 829-32, PMID 6230922.
W.C. Reeves et al., Two-dimensional echocardiographic assessment of electrocardiographic criteria for right atrial enlargement., in Circulation, vol. 64, n. 2, agosto 1981, pp. 387-91, PMID 6454512.
S.A. Kothari et al., Evidence supporting a new rate threshold for multifocal atrial tachycardia., in Clin Cardiol, vol. 28, n. 12, dicembre 2005, pp. 561-3, PMID 16405199.