ŠTRUMBERGER, Nada; ŠEKERIJA, Željko; PERAKOVIĆ, Dragan. Autogas in Road Traffic. Promet - Traffic&Transportation, [S. l.], v. 15, n. 2, p. 93–99, 2003. Disponível em: https://traffic2.fpz.hr/index.php/PROMTT/article/view/2022. Acesso em: 26 aug. 2025.