ŠTRUMBERGER, Nada; DŽANIĆ, Husein. Okoliš i automobil. Promet - Traffic&Transportation, [S. l.], v. 5, n. 3-4, p. 113–116, 2012. Disponível em: https://traffic2.fpz.hr/index.php/PROMTT/article/view/1736. Acesso em: 28 aug. 2025.