BASRIATI, S.; SAFITRI, E.; SARTIKA, D. Optimization of Drinking Water Distribution Costs Using Vogel’s Approximation Method (VAM) and Three Modified Methods of VAM (Case Study: Sikumbang Kampar Spring). Numerical: Jurnal Matematika dan Pendidikan Matematika, [S. l.], v. 5, n. 2, p. 103–114, 2021. DOI: 10.25217/numerical.v5i2.1419. Disponível em: https://www.journal.iaimnumetrolampung.ac.id/index.php/numerical/article/view/1419. Acesso em: 14 jul. 2025.