ISTVÁNFY, Gy. ANALYSE DER METHODE DER VIER ERWÄRMUNGSMESSUNGEN Periodica Polytechnica Electrical Engineering, [S. l.], v. 6, n. 1, p. 87–105, 1962. Disponível em: https://pp.bme.hu/ee/article/view/5316. Acesso em: 18 may. 2024.