刘阳. 马克思早期幸福观初探. 人文与社会科学学刊, [S. l.], v. 1, n. 4, p. 307–312, 2025. DOI: 10.70693/rwsk.v1i4.540. Disponível em: https://ac.wisvora.com/index.php/rwshkx/article/view/540. Acesso em: 13 aug. 2025.