กิตติวรปรีดา ว. Personal alarm device for elderly people who live alone. Vocational Education Central Region Journal, [S. l.], v. 4, n. 2, p. 66–78, 2020. Disponível em: https://so06.tci-thaijo.org/index.php/IVECJournal/article/view/246243. Acesso em: 20 apr. 2024.