Zakaria, Nur Haryani, et al. “Design and Development of Self Check: A Mobile Application for Digital Gadgets Addiction and Countermeasures”. Multidisciplinary Applied Research and Innovation, vol. 4, no. 1, Jan. 2023, pp. 211-5, https://penerbit.uthm.edu.my/periodicals/index.php/mari/article/view/9896.