Designing Quasi-harmonic Circular Membranes with Different Densities on Angular Sectors. Romanian Journal of Acoustics and Vibration, [S. l.], v. 18, n. 1, p. 9–17, 2021. Disponível em: https://rjav.sra.ro/index.php/rjav/article/view/181.. Acesso em: 24 aug. 2026.