XIONG, Hanchuan. A Comparative Study on Political Participation of the Elderly in China and the United States. Transactions on Social Science, Education and Humanities Research, London, U.K., v. 1, p. 191–195, 2023. Disponível em: https://wepub.org/index.php/TSSEHR/article/view/32. Acesso em: 3 jul. 2026.