C. T. S. Setyaningrum, I. S. . Kusuma H, G. . Falinda S. P, R. . Nur, and M. Z. . Badollahi, “ASSOCIATION OF SMARTPHONE USE IN ONLINE LEARNING TO CHILDREN’S COGNITIVE IMPAIRMENT DURING COVID-19 PANDEMIC”, JSRMBS, vol. 5, no. 4, pp. 67-76, Dec. 2024.