Antulov-Fantulin, Bruno, Biljana Juričić, Tomislav Radišić, and Cem Çetek. “Determining Air Traffic Complexity – Challenges and Future Development”. Promet - Traffic&Transportation 32, no. 4 (July 16, 2020): 475-485. Accessed April 17, 2024. http://traffic.fpz.hr/index.php/PROMTT/article/view/3401.