GALOVIĆ, Borivoj; NOVAK, Doris; KAŠTELAN, Tomislav. Helicopter Noise And Noise Abatement Procedures. Promet - Traffic&Transportation, [S. l.], v. 16, n. 2, p. 91–96, 2004. Disponível em: https://traffic2.fpz.hr/index.php/PROMTT/article/view/2071. Acesso em: 26 aug. 2025.