Masiulionienė, Gabrielė, and Gytė Tupčiauskaitė. “Bridging the Gap Between ICAO Level 4 and 5 in Aviation English: Expectations and Results ”. Aviation 27, no. 3 (November 15, 2023): 197–211. Accessed November 10, 2024. https://btp.vgtu.lt/index.php/Aviation/article/view/19763.