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<strong>Jurnal Matematika</strong>, [S.l.], v. 11, n. 1, p. 20-33, july 2021.
ISSN 2655-0016.
Available at: &lt;<a href="http://103.29.196.112/index.php/jmat/article/view/69360" target="_new">http://103.29.196.112/index.php/jmat/article/view/69360</a>&gt;. Date accessed: 16 dec. 2025.
doi: <a href="https://doi.org/10.24843/JMAT.2021.v11.i01.p133">https://doi.org/10.24843/JMAT.2021.v11.i01.p133</a>.