YANG, Yixin; CHEN, Jin. Analysis of Interprovincial Trade Relationships Based on Improved Gravity Modeling. Frontiers in Humanities and Social Sciences, [S. l.], v. 4, n. 4, p. 1–6, 2024. DOI: 10.54691/6mmwjv38. Disponível em: https://bcpublication.org/index.php/FHSS/article/view/6230. Acesso em: 31 may. 2026.