FATMAWATI, Ayu Isnaini; LUBIS, Riri Syafitri. Estimated Sulfur Dioxide Pollutant Concentrations In Medan City Using Ordinary Kriging and Inverse Distance Weighting Approaches. Mathline : Jurnal Matematika dan Pendidikan Matematika, [S. l.], v. 9, n. 1, p. 13–30, 2024. DOI: 10.31943/mathline.v9i1.548. Disponível em: https://mathline.unwir.ac.id/index.php/Mathline/article/view/548. Acesso em: 24 dec. 2025.