MAKAREWICZ, Rufin. The equation of acoustic rays in an inhomogeneous moving medium. Archives of Acoustics, [S. l.], v. 1, n. 1, p. 21–27, 1976. Disponível em: https://acoustics.ippt.gov.pl/index.php/aa/article/view/3499. Acesso em: 4 mar. 2026.