MAHALEC, Ivan. Analiza gibanja ventilske opruge. Promet - Traffic&Transportation, [S. l.], v. 8, n. 1-2, p. 1–10, 2012. Disponível em: https://traffic2.fpz.hr/index.php/PROMTT/article/view/1782. Acesso em: 27 aug. 2025.