OZIMEK, Edward; JUGOWAR, Lech; RUTKOWSKI, Leon. Problem of the instantaneous sound frequency measurement. Archives of Acoustics, [S. l.], v. 9, n. 4, p. 325–339, 2015. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3237. Acesso em: 26 apr. 2025.