ZENG, Xin. Ethical Difficulties of the Elderly Challenges and Opportunities in the smart phone era. Transactions on Social Science, Education and Humanities Research, London, U.K., v. 13, p. 211–217, 2024. DOI: 10.62051/vr328159. Disponível em: https://wepub.org/index.php/TSSEHR/article/view/3668. Acesso em: 14 jul. 2026.