KMITA, E. Professional competence of air traffic controller in the sphere of subject-activity approach. Journal of Education, Technology and Computer Science, [S. l.], v. 7, n. 1, p. 204–209, 2013. Disponível em: https://journals.ur.edu.pl/jetacomps/article/view/6833. Acesso em: 23 lis. 2024.