USE OF MOBILE APPLICATIONS IN TEACHING STUDENTS WRITTEN BUSINESS COMMUNICATION AS A FACTOR OF IMPROVING THE QUALITY OF TRAINING. Proceedings of Southern Federal University. Philology, [S. l.], v. 26, n. 1, p. 194–205, 2022. Disponível em: https://philol-journal.sfedu.ru/index.php/sfuphilol/article/view/1717. Acesso em: 11 may. 2026.