“Trend Analysis of the Mobile Health COVID-19 Application As A Preventive Strategy in the Era of COVID-19 Pandemic in Surakarta”, J HEALTH PROMOT BEHAV, vol. 6, no. 2, pp. 104–111, Apr. 2021, Accessed: Oct. 18, 2025. [Online]. Available: https://www.thejhpb.com/index.php/thejhpb/article/view/314