The Relationship Between Insomnia Levels and Learning Concentration Among Nursing Students at Sultan Agung Islamic University. Journal of Health, Medical, and Psychological Studies, [S. l.], v. 1, n. 2, p. 148–155, 2025. DOI: 10.65310/hntj5q89. Disponível em: https://scriptaintelektual.com/sanitas/article/view/628. Acesso em: 4 feb. 2026.