H.A. Snellen, Two Pioneers of Electrocardiography. The Correspondence between Einthoven and Lewis from 1908-1926. BMGN - Low Countries Historical Review, [S. l.], v. 101, n. 2, p. 259–260, 1986. DOI: 10.18352/bmgn-lchr.2718. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-102951.. Acesso em: 2 jul. 2024.