LEVENDOVSZKY, János. Preface. Periodica Polytechnica Electrical Engineering, [S. l.], v. 51, n. 3-4, p. 73–73, 2007. 10.3311/pp.ee.2007-3-4.01. Disponível em: https://pp.bme.hu/ee/article/view/878. Acesso em: 5 may. 2024.