ŁĘTOWSKI, Tomasz; ZIMAK, Lidia; CIOŁKOSZ-ŁUPINOWA, Halina. Timbre differences of an individual voice in solo and in choral singing. Archives of Acoustics, [S. l.], v. 13, n. 1-2, p. 55–65, 2015. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3061. Acesso em: 25 apr. 2025.