YUAN, Yuan. Research on Inter-provincial Cooperative Development of Regional Tourism: A Case Study of Hukou Waterfall in Shaanxi and Shanxi, a 5A Scenic Spot. Frontiers in Sustainable Development, [S. l.], v. 3, n. 9, p. 68–76, 2023. DOI: 10.54691/fsd.v3i9.5624. Disponível em: https://bcpublication.org/index.php/FSD/article/view/5624. Acesso em: 3 jul. 2026.