GUO, Qianshuo. Nature and Specific Determination of Substituted Performance Agreements. Frontiers in Humanities and Social Sciences, [S. l.], v. 6, n. 1, p. 105–113, 2026. DOI: 10.54691/t1h0g976. Disponível em: https://fhssjournal.org/index.php/ojs/article/view/495. Acesso em: 5 nov. 2026.