HUY HUNG TA; THI MAI LE. PROBLEMATIC SMARTPHONE USE AND STUDENT ANXIETY IN CLASS IN UNIVERSITIES IN THE FOURTH INDUSTRIAL REVOLUTION CONTEXT. International Journal of Social Science, Management and Economics Research, [S. l.], v. 4, n. 2, p. 1–11, 2026. DOI: 10.61421/IJSSMER.2026.4201. Disponível em: https://ijssmer.com/pub/ijssmer/article/view/120. Acesso em: 11 apr. 2026.