SETYOWISNU, Glagah Eskacakra; 						MUZDALIFAH, Lilik; 						SAPUTRO, Isnu Aji.
 ASYMPTOTIC STUDY OF NONLINEAR SPRING OSCILLATION WITH EXTERNAL FORCE USING THE MULTIPLE TIME SCALES METHOD.
<strong>Jurnal Ilmiah Matematika dan Pendidikan Matematika</strong>, [S.l.], v. 17, n. 2, p. 115-132, jan. 2026.
ISSN 2550-0422.
Available at: &lt;<a href="https://jos.unsoed.ac.id/index.php/jmp/article/view/18081" target="_new">https://jos.unsoed.ac.id/index.php/jmp/article/view/18081</a>&gt;. Date accessed: 17 jan. 2026.
doi: <a href="https://doi.org/10.20884/1.jmp.2025.17.2.18081">https://doi.org/10.20884/1.jmp.2025.17.2.18081</a>.