MAKAREWICZ, Rufin. The location of the ground focus line produced by a supersonic aircraft. Archives of Acoustics, [S. l.], v. 2, n. 3, p. 167–176, 1977. Disponível em: http://acoustics.ippt.gov.pl/index.php/aa/article/view/3480. Acesso em: 18 apr. 2026.