Russel, C., A. Waworuntu, D. Surya, J. N. Zebua, and R. Sandy. “Development of an Android-Based Journaling and Mood Tracking Mobile Application for Improving Mental Health Using Firebase Application Programming Interface”. International Journal of Scientific Reports, vol. 9, no. 4, Mar. 2023, pp. 107-12, doi:10.18203/issn.2454-2156.IntJSciRep20230716.