KHARCHENKO, V.; CHYNCHENKO, Y.; RAYCHEV, S. REGIONAL APPLICATION OF THE FIRST EUROPEAN AIR TRAFFIC CONTROLLER SELECTION TEST IN BULGARIA. Proceedings of National Aviation University (archive), [S. l.], v. 29, n. 3, p. 42–45, 2006. DOI: 10.18372/2306-1472.29.1359. Disponível em: http://jrnl.kai.edu.ua/index.php/visnik/article/view/1359. Acesso em: 16 apr. 2026.