Data-Driven Insights for Tourism Development in East Java Using Directed Graphs. Riemann: Research of Mathematics and Mathematics Education, [S. l.], v. 7, n. 1, p. 20–35, 2025. DOI: 10.38114/reimann.v7i1.97. Disponível em: https://journal.sanagustin.ac.id/index.php/reimann/article/view/97.. Acesso em: 24 mar. 2026.