REZO, Zvonimir; STEINER, Sanja; MIHETEC, Tomislav. European Airspace (De)Fragmentation Assessment Model. Promet - Traffic&Transportation, [S. l.], v. 33, n. 2, p. 309–318, 2021. DOI: 10.7307/ptt.v33i2.3645. Disponível em: https://traffic2.fpz.hr/index.php/PROMTT/article/view/2928. Acesso em: 26 aug. 2025.