LIWANAG, Stephanie E. et al. Personal Emergency Alert Device Containing Real-Time Location. International Journal of Computing Sciences Research, [S.l.], v. 6, p. 694-706, jan. 2022. ISSN 2546-115X. Available at: <//stepacademic.net/ijcsr/article/view/234>. Date accessed: 23 dec. 2024.