GRÀCIA, X.; SANZ-PERELA, T. The wave equation for stiff strings and piano tuning. Reports@SCM, [S. l.], v. 3, n. 1, p. 1–16, 2018. Disponível em: https://revistes.iec.cat/index.php/reports/article/view/139742. Acesso em: 5 apr. 2025.