QIN, Yingning. Research on Supply and Demand Deviation and Optimization Strategy of Catering Service for the Elderly in Bengbu. Frontiers in Humanities and Social Sciences, [S. l.], v. 5, n. 2, p. 135–141, 2025. DOI: 10.54691/wcdp8r34. Disponível em: http://fhssjournal.org/index.php/ojs/article/view/64. Acesso em: 17 apr. 2026.