NUGRAHA, A. S.; MAULANA, I. Gadget Use Intensity and Learning Concentration Among Junior High School Students: The Mediating Role of Learning Motivation. Journal of Mathematics Instruction, Social Research and Opinion, Bandung, Indonesia, v. 5, n. 3, p. 2527–2538, 2026. DOI: 10.58421/misro.v5i3.2142. Disponível em: https://journal-gehu.com/index.php/misro/article/view/2142. Acesso em: 6 nov. 2026.