WANKHEDE, P. C. Vibrations in Thick Hollow Elastic Spheres. Defence Science Journal, [S. l.], v. 24, n. 3, p. 85–90, 2014. DOI: 10.14429/dsj.24.6547. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/6547. Acesso em: 15 jun. 2025.