USE OF MOBILE APPLICATIONS IN TEACHING STUDENTS WRITTEN BUSINESS COMMUNICATION AS A FACTOR OF IMPROVING THE QUALITY OF TRAINING. Известия ЮФУ. Филологические науки [Internet]. 2022 Apr. 20 [cited 2026 May 11];26(1):194-205. Available from: https://philol-journal.sfedu.ru/index.php/sfuphilol/article/view/1717