NARITA, F.; SHINDO, Y.; SAITO, F.; MIKAMI, M. Testing and analysis of high frequency electroelastic characteristics of piezoelectric transformers. Archives of Mechanics, Warsaw, Poland, v. 59, n. 2, p. 119–131, 2007. Disponível em: http://am.ippt.gov.pl/index.php/am/article/view/v59p119. Acesso em: 17 jan. 2026.