LUBIS, M. R. Z.; KADRI, A. Correlation Between Blue Light Exposure from Digital Device Screens and Sleep Quality Among Students in the Faculty of Medicine, Universitas Sumatera Utara Class of 2019. Sumatera Medical Journal, [S. l.], v. 6, n. 2, p. 71–76, 2023. DOI: 10.32734/sumej.v6i2.11051. Disponível em: https://talenta.usu.ac.id/smj/article/view/11051. Acesso em: 4 aug. 2025.