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<strong>Jurnal Matematika</strong>, [S.l.], v. 5, n. 1, p. 30-35, june 2015.
ISSN 2655-0016.
Available at: &lt;<a href="https://ojs.unud.ac.id/index.php/jmat/article/view/16563" target="_new">https://ojs.unud.ac.id/index.php/jmat/article/view/16563</a>&gt;. Date accessed: 15 jan. 2025.
doi: <a href="https://doi.org/10.24843/JMAT.2015.v05.i01.p53">https://doi.org/10.24843/JMAT.2015.v05.i01.p53</a>.