KEMP, B. A.; SHEPPARD, C. J. Electromagnetic and material contributions to stress, energy, and momentum in metamaterials. Advanced Electromagnetics, [S. l.], v. 6, n. 1, p. 11–19, 2017. DOI: 10.7716/aem.v6i1.430. Disponível em: https://www.aemjournal.org/index.php/AEM/article/view/430. Acesso em: 23 apr. 2025.