NIEWIAROWICZ, Marek; ŁOPACZ, Henryk. Directional properties of the loudspeaker systems with analog and digital crossover networks. Archives of Acoustics, [S. l.], v. 33, n. 4, p. 541–551, 2008. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/551. Acesso em: 26 apr. 2025.